Nazwa wtyczki	Temporary Login
Rodzaj podatności	Luka w uwierzytelnianiu
Numer CVE	CVE-2026-7567
Pilność	Wysoki
Data publikacji CVE	2026-05-05
Adres URL źródła	CVE-2026-7567

URGENT: WordPress Temporary Login plugin (<= 1.0.0) — Authentication Bypass to Account Takeover (CVE-2026-7567) — What Every Site Owner Must Do Now

Autor: Zespół badawczy WP‑Firewall

Data: 2026-05-05

Tagi: WordPress, security, WAF, vulnerability, CVE-2026-7567, temporary-login

Streszczenie: A high‑severity vulnerability (CVE‑2026‑7567) in the WordPress Temporary Login plugin (versions <= 1.0.0) enables unauthenticated attackers to bypass authentication and take over accounts. CVSS: 9.8. Patch available in 1.1.0. If you run this plugin (or host sites that do), follow the immediate incident steps and long‑term mitigations we outline below.

Spis treści

• Przegląd podatności
• Dlaczego to ma znaczenie dla stron WordPress
• Technical summary (what is happening)
• How attackers can (and will) exploit this
• Natychmiastowe działania (pierwsze 60–120 minut)
• Mitigation and recovery checklist (detailed steps)
• How a WAF helps: recommended rules and strategies
• Post‑incident hardening and monitoring
• Forensics and evidence collection
• Lessons learned and secure development notes for plugin authors
• Secure your site with WP‑Firewall — Free plan details and signup

---

Przegląd podatności

On 5 May 2026 a critical authentication bypass vulnerability affecting the WordPress Temporary Login plugin (versions up to and including 1.0.0) was disclosed and assigned CVE‑2026‑7567. This flaw allows unauthenticated actors to bypass normal authentication checks and escalate to account takeover in many configurations. The vulnerability has a CVSS score of 9.8, which classifies it as critical/high severity.

A patch is available in version 1.1.0. Sites still running vulnerable versions are at immediate risk and require urgent action. Exploit attempts are expected to be weaponized quickly and used in mass exploitation campaigns because of the severity and the relatively small technical effort required in many environments.

---

Dlaczego to ma znaczenie dla stron WordPress

• The Temporary Login plugin is used to generate ephemeral access links for collaborators, developers and agencies. On sites where it is active, a bypass allows an attacker to create or use temporary sessions that grant administrative or privileged access without needing legitimate credentials.
• Account takeover on a WordPress site commonly results in arbitrary code execution (via plugin/theme installs), data exfiltration, SEO spam, redirect/malware injection, or ransomware-style attacks. Small sites are as attractive as large ones because automated tooling scales attacks.
• Because the vulnerability is exploitable without authentication, attackers can scan and attempt attacks at an internet scale. That means any site using the affected plugin is at risk regardless of traffic or profile.

---

Technical summary (what is happening)

This vulnerability is classified as an authentication bypass / broken authentication issue. In essence:

• The plugin exposes functionality that creates or validates temporary login tokens / links.
• Authorization checks (capability checks, nonce validation, or proper request origin checks) are incomplete or missing for specific endpoints or request flows.
• Because of the missing checks, an unauthenticated requester can generate a valid session or re-use a token that grants elevated privileges — effectively logging into an account (often an administrator) without owning credentials.
• The plugin exposes these flows to public endpoints (REST routes, AJAX handlers, or direct URL access) so remote attackers can trigger them.

Patched versions (1.1.0 and later) correct the authorization logic and ensure temporary credentials are issued and validated only after proper capability and nonce checks and with strict lifetime and scope controls.

---

How attackers can (and will) exploit this

Attackers typically follow an automated workflow:

1. Identify websites that have the affected plugin and a vulnerable version. This is done via signature-based scanning (specific file names, paths, or public assets) and fingerprinting.
2. Send crafted requests to the plugin endpoint(s) that handle temporary login creation or validation, exploiting the missing checks.
3. Establish a session or obtain credentials that map to an existing administrative user, or create a new privileged user.
4. Use the account to install a backdoor, create persistent accounts, exfiltrate data, or pivot to other assets.

Because the vulnerability allows unauthenticated access, the window for successful exploitation is large — attackers will weaponize scripts within hours and run broad scanning campaigns. Many site owners will not notice anything initially if attackers act stealthily.

---

Natychmiastowe działania (pierwsze 60–120 minut)

If your site uses the Temporary Login plugin (<= 1.0.0), perform these actions now. These are triage steps that prioritize containment.

1. Update the plugin immediately to 1.1.0 or later.
   • The patch fixes the flaw in authorization logic. Updating is the fastest, most reliable solution.
2. Jeśli nie możesz zaktualizować natychmiast, dezaktywuj wtyczkę.
   • Deactivate from Dashboard → Plugins or via WP‑CLI: wp plugin deactivate temporary-login
3. If you detect suspicious logins or cannot update/deactivate safely, take the site offline temporarily (maintenance mode) while you investigate.
4. Rotate passwords for all administrator and editor accounts.
   • Force password reset for all privileged users (especially those whose accounts might have been linked to temporary logins).
5. Enforce 2‑factor authentication (2FA) if available and possible — especially for admin accounts.
6. Scan for indicators of compromise (malware files, new admin users, modified core files).
   • Use multiple scanning tools if possible (malware scanner in the WAF, host AV, manual code inspection).
7. Check active sessions and invalidate all sessions if you suspect takeover.
   • Use WP‑CLI or plugins to expire sessions or change auth keys in wp-config.php (AUTH_KEY etc.) to force logout.
8. Inspect web server and plugin logs for requests to Temporary Login endpoints and unusual activity from IPs.
9. Notify your hosting provider or security contact if you need support or isolation.

---

Mitigation and recovery checklist (detailed step‑by‑step)

Below is the step‑by‑step recovery checklist. Treat the site as potentially compromised until proven otherwise.

1. Inwentaryzacja i potwierdzenie
   • Potwierdź wersję wtyczki: wp plugin list | grep temporary-login or check Plugins page.
   • Confirm whether the plugin is active.
2. Patch or disable
   • Update to 1.1.0 or later.
   • If update is not possible, deactivate and remove the plugin until a safe patch is available.
3. Account and session controls
   • Zresetuj hasła dla wszystkich użytkowników na poziomie administratora.
   • Remove any unexpected admin users.
   • Expire all sessions. You can rotate AUTH_KEY/AUTH_SALT values in wp-config.php and force logouts.
4. Revoke temporary login tokens
   • If the plugin stores temporary links or tokens in opcje_wp or postmeta, remove any lingering temporary tokens or transient entries. (Be cautious: backup DB first.)
   • Remove any saved options left by the plugin that could be re-used.
5. Full malware scan and clean
   • Run an immediate full filesystem and database scan for changed files, web shells, or injected code.
   • Sprawdzać wp-content/przesyłanie for PHP files (common location for web shells).
   • Zbadaj Plik .htaccess I indeks.php files in uploads and theme directories.
6. Sprawdź na trwałość
   • Search for scheduled tasks (cron) added by attackers.
   • Search for recently modified files and newly created users (use WP‑CLI or DB queries).
7. Analiza logów
   • Przejrzyj logi dostępu dla:
     • Requests to plugin endpoints.
     • Suspicious parameters, HTTP methods, or unusual user agents.
     • Repeated attempts from single IP ranges.
   • Save and export logs for future forensics.
8. Rebuild trust boundary
   • If compromise is confirmed and cleaning is complex, consider restoring from a clean backup (from before the first suspected exploitation).
   • Reinstall core WordPress files, themes and plugins from trusted sources and verify file integrity.
9. Post‑cleanup hardening
   • Rotate API keys, OAuth tokens, and any external integration credentials.
   • Enable least privilege for users and remove unnecessary admin accounts.
   • Periodically scan and audit plugins for updates and security advisories.
10. Powiadomienia i raportowanie
    • Notify any affected stakeholders.
    • If data breach rules apply in your jurisdiction, follow legal reporting obligations.
    • Consider engaging a professional incident response provider for larger breaches.

---

How a Web Application Firewall (WAF) helps — recommended rules and strategies

A properly configured WAF can provide an immediate layer of protection to block exploitation attempts while you patch. Below are recommended approaches and example rule descriptions. Do not apply blindly—test in a staging environment before enforcement.

1. Block access to plugin endpoints from unauthenticated origins
   • Strategy: Deny unauthenticated POST/GET requests to the plugin’s REST or AJAX endpoints that are expected to require administrator privileges.
   • Implementation idea: Configure rule to allow only requests that include a valid WordPress nonce or originate from an authenticated session (cookie present + valid nonce). In practice, WAFs can block requests that match the specific endpoint pattern when no authentication cookie is present.
2. Rate‑limit and IP reputation
   • Strategy: Apply rate limits for the plugin endpoints to slow down scanning and brute‑force style exploitation.
   • Implementation: Limit requests per IP to suspicious endpoints to a small threshold per minute/hour and throttle or block exceeding IPs temporarily.
3. Zablokuj znane wzorce ładunków eksploitów
   • Strategy: Block requests containing suspicious payloads or parameters that correlate with exploit attempts (attempts to create tokens, manipulate temporal parameters, etc.).
   • Implementation: Use pattern matching for suspicious parameter names or values. Do not reveal patterns publicly that could help attackers craft around them.
4. Protect admin entry points
   • Strategy: Harden wp-login.php, wp-admin I admin-ajax.php via the WAF:
     • Geo or IP allowlist for admin panel (where feasible).
     • Require 2FA for admin logins and block repeated failed attempts.
     • Hide admin URLs where possible (security through obscurity is secondary, but combined with other controls it helps).
5. Wirtualne łatanie
   • Strategy: Apply a virtual patch while developers apply a code fix. This is a WAF rule that drops or redirects exploitative requests before they reach WordPress.
   • Implementation idea: Drop requests that match the exploitation signature for the Temporary Login plugin; treat this as a temporary emergency measure.
6. Block suspicious user agent and headless scanner behavior
   • Strategy: Many exploit scanners use predictable user agent strings or no user agents at all. Enforce strict UA policies for plugin endpoints, but allow legitimate hooks (monitor for false positives).

Example pseudo-rule descriptions (do not expose exact exploit payloads):

• Rule A (Endpoint access control)
  • JEŚLI ścieżka żądania pasuje /wp-json/temporary-login/* LUB zawiera /temporary-login.php
  • AND request does NOT include a valid WordPress auth cookie or recognized internal referer
  • THEN challenge / block / return 403
• Rule B (Rate limiting)
  • IF request path matches temporary-login endpoints
  • AND requests from same IP > 10 in 60 seconds
  • THEN throttle/block for 15 minutes
• Rule C (Parameter anomaly)
  • IF request contains parameters normally only present in admin workflows (e.g., create_token, expiry_override) from unauthenticated IPs
  • WTEDY blokuj i rejestruj

Note: Exact path patterns depend on the plugin’s implementation. WP‑Firewall customers can apply the emergency virtual patch rules we provide in the dashboard; if you run another WAF, configure similar protections immediately.

---

Post‑incident hardening and monitoring

Once you have patched and cleaned, treat this as an opportunity to harden your WordPress deployment:

1. Utrzymuj wtyczki i motywy w najnowszej wersji
   • Remove unused plugins/themes. Every installed item increases risk and maintenance burden.
2. Zasada najmniejszych uprawnień
   • Limit the number of administrator accounts; give users only the roles they require.
   • Regularly audit user list and role assignment.
3. Uwierzytelnianie dwuskładnikowe (2FA)
   • Enforce 2FA for all privileged users. This reduces the impact of credential compromises and some forms of token abuse.
4. Continuous WAF protection
   • Keep WAF rules up to date and enable automatic protections for known vulnerable plugin patterns when your WAF vendor provides them.
   • Use virtual patching for zero‑day protection until proper code fixes are deployed.
5. Zarządzanie sesjami
   • Shorten session lifetimes for privileged users.
   • Force logout after password changes or other suspicious activities.
6. Rejestrowanie i integracja SIEM
   • Forward logs to a central system for correlation and long‑term retention.
   • Set alerts for anomalous admin creation events, new plugin installs, and unexpected privilege escalations.
7. Backup and disaster recovery
   • Maintain regular offline backups with immutable retention.
   • Test restoration processes regularly.
8. Security scans and penetration testing
   • Schedule periodic vulnerability scanning and internal security reviews for priority plugins and custom code.

---

Forensics and evidence collection

If you suspect exploitation occurred, collect and preserve evidence before you overwrite or clear logs:

• Save web server access and error logs, and any WAF logs related to the event.
• Export database snapshots (read-only) for analysis.
• Export a copy of all files (tar/zip) including timestamps and permissions.
• Record the sequence of actions you took and timestamps — this helps responders and insurers.
• If you engage a third-party incident responder, provide full logs and copies of suspicious files.

Common forensic indicators:

• Sudden addition of privileged user accounts or existing accounts with escalated roles.
• Unexpected posts, pages, or changes to theme files.
• PHP files in uploads directories or unusual scheduled cron jobs.
• Requests to the plugin endpoints from many different IPs in a short time window.

---

Lessons learned — guidance for plugin authors and site owners

Dla autorów wtyczek:

• Always validate user capabilities for sensitive operations. Assume any public endpoint can be reached by unauthenticated users.
• Use WordPress nonces correctly and validate them server‑side for every sensitive action.
• Implement rate limits and ensure tokens/links are one‑time use with short lifetimes.
• Avoid storing permanent elevated credentials or allowing privilege escalation through temporary artifacts.

Dla właścicieli witryn:

• Avoid relying on convenience features that grant elevated access without multiple authentication factors.
• Where possible, restrict management/temporary access operations to trusted IP ranges or authenticated sessions.
• Ensure you have a process to update plugins promptly (automatic updates for minor/security releases where safe).
• Keep a close inventory of which sites use third‑party access tools; treat them as high‑risk components.

---

Security checklist you can copy / paste (short action list)

• Confirm plugin version; update to 1.1.0 or later OR deactivate plugin.
• Rotate admin passwords and force password reset for all admins.
• Revoke sessions by rotating AUTH_KEY and salts if compromise suspected.
• Scan filesystem and uploads for suspicious PHP files.
• Remove unexpected admin users and check user meta for suspicious entries.
• Review access logs for unusual plugin endpoint traffic.
• Apply emergency WAF rule(s) to block unauthenticated access to plugin endpoints and rate‑limit access.
• Backup current site (files + DB) for forensics before making sweeping changes.
• Reinstall WordPress core and plugins from trusted sources if compromise is suspected.
• Włącz 2FA i ogranicz dostęp administratora według adresu IP, gdzie to możliwe.
• Schedule post‑incident audit and monitoring.

---

Często zadawane pytania

Q: Is updating to 1.1.0 enough?
A: Yes — the vendor released 1.1.0 to address the authorization bypass, and updating is the recommended remediation. However, if there are signs of compromise prior to your update, you must also perform incident response steps (scan, clean, rotate creds).

Q: I don’t use the “temporary login” feature — am I safe?
A: If the plugin is installed and active, you are at risk because the vulnerable code may be reachable. Deactivate and remove the plugin if you do not use it. If you never installed the plugin, you’re unaffected by this specific issue; still maintain standard security hardening.

P: Czy powinienem całkowicie usunąć wtyczkę?
A: If you do not need the plugin, uninstall it and remove any residual options or transient data. If you need the functionality, update to 1.1.0 as soon as possible and harden access.

Q: What if I already see unauthorized admin users?
A: Treat as a confirmed compromise. Follow the “Mitigation and recovery checklist” above and consider restoring from a clean backup created before the earliest suspicious activity.

---

How WP‑Firewall protects your site (and what we recommend right now)

As a WordPress firewall and security service provider we see zero‑day and known‑vulnerability exploitation attempts in real time. Our recommendations are:

• Patch the plugin immediately.
• Enable virtual patching rules (applied at the WAF edge) to block exploitation attempts targeting Temporary Login endpoints while you patch.
• Enforce strict access controls to admin pages and REST endpoints (via WAF and WordPress hardening).
• Enable automatic malware scanning and removal for critical assets.
• Schedule alerts for any changes in plugin status, new admin users, or file system modifications.

We maintain curated emergency rule sets for high‑risk vulnerabilities and push them to managed customers to block exploitation attempts preemptively. If you’re using a managed WAF, make sure emergency rules are enabled during vulnerability windows.

---

For developers: secure design checklist for temporary access features

If you are building a temporary access/impersonation feature for WordPress, follow these rules:

• Validate capability checks on every request; never rely solely on front‑end validation.
• Use secure, one‑time tokens stored with expiry timestamps; store minimal information and validate server‑side.
• Use nonces and check them server side for AJAX/REST requests.
• Limit scope of temporary tokens to specific actions, not to full admin privileges unless absolutely needed.
• Log issuance and usage of temporary links and make them revocable by site administrators.
• Validate referer or origin headers where appropriate and design endpoints to require authenticated callers.
• Consider requiring the request initiating a temporary session to originate from an already authenticated admin (establish an auditable chain of custody).

---

Secure Your Site Instantly — Start with WP‑Firewall Free

We believe every WordPress site deserves strong baseline protection as soon as a vulnerability appears. If you want to protect your site from exploitation attempts like CVE‑2026‑7567 right now, try our WP‑Firewall Free plan. It includes essential managed firewall protection with virtual patching capability, unlimited bandwidth, a robust WAF, malware scanning and mitigation for OWASP Top 10 risks — everything you need to block common and emerging attacks immediately.

Dlaczego wybrać plan darmowy?

• Essential protection at no cost: managed firewall + WAF + malware scanner
• Nielimitowana przepustowość (bez ukrytych ograniczeń)
• Mitigation of OWASP Top 10 risks (virtual patching rules for critical vulnerabilities)
• Easy upgrade path to richer protections (automatic malware removal and IP allow/deny options in paid tiers)

Sign up and secure your site today: https://my.wp-firewall.com/buy/wp-firewall-free-plan/

(If you manage multiple sites, consider our Standard or Pro plans for automatic malware removal, IP blacklisting/whitelisting, monthly security reports, automatic virtual patching, and premium managed services.)

---

Final notes — practical timeline and priority

• Natychmiast (0–2 godziny): Verify plugin presence; update to 1.1.0 or deactivate; apply emergency WAF protections if update is delayed; rotate admin passwords and expire sessions if suspicious.
• Krótkoterminowe (24–72 godziny): Perform full site scan, log review, remove any malicious content; ensure backups are secure and uninfected.
• Średnioterminowe (1–4 tygodnie): Harden admin access, enable 2FA, review user roles, enable continuous monitoring and WAF enforcement.
• Długoterminowe: Implement regular patching processes, scheduled penetration testing, and maintain an inventory of plugins in use.

This vulnerability is an urgent reminder: convenience features that manage access require the same security scrutiny as authentication systems. If you need help implementing any of the actions above, our WP‑Firewall support engineers can assist — from applying emergency WAF rules and virtual patches to conducting full incident response and remediation.

Bądź bezpieczny, bądź na bieżąco z poprawkami.

— WP‑Firewall Research & Incident Response Team