CVE-2024-51684 Overview
CVE-2024-51684 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] in the Ciprian Popescu W3P SEO WordPress plugin (wp-perfect-plugin). The flaw affects all versions up to and including 1.8.6. An attacker can chain the CSRF weakness with stored Cross-Site Scripting (XSS) to inject persistent JavaScript into the WordPress admin context. Successful exploitation requires a privileged user to interact with attacker-controlled content, such as visiting a malicious link while authenticated.
Critical Impact
An unauthenticated attacker can trick an authenticated WordPress administrator into submitting a forged request that stores malicious JavaScript, leading to persistent XSS execution in the admin interface.
Affected Products
- W3P SEO (wp-perfect-plugin) versions through < 1.8.6
- WordPress sites running the vulnerable plugin
- Administrative sessions of users interacting with attacker-controlled pages
Discovery Timeline
- 2024-11-14 - CVE-2024-51684 published to NVD
- 2026-04-23 - Last updated in NVD database
Technical Details for CVE-2024-51684
Vulnerability Analysis
The W3P SEO plugin exposes administrative actions without sufficient anti-CSRF protections. Plugin endpoints that modify stored configuration or content do not validate a cryptographic nonce tied to the requesting user's session. An attacker hosts a crafted page that triggers a state-changing request to the target WordPress site. When an authenticated administrator visits the page, the browser submits the request with valid session cookies.
Because the affected endpoint also fails to sanitize input before persisting it, attacker-supplied JavaScript is stored in the database. The payload then renders unescaped in the WordPress admin interface. This converts a single-victim CSRF into a stored XSS that executes against any administrator viewing the affected page.
The scope-changed impact reflects that script executed in the admin browser can pivot beyond the plugin: creating accounts, modifying posts, exfiltrating nonces, or installing additional plugins. The EPSS data indicates low observed exploitation likelihood at this time, but the chained nature of the bug raises practical risk for sites running the unpatched plugin.
Root Cause
The root cause is twofold: missing CSRF token validation on privileged plugin actions and missing output encoding or input sanitization for stored fields. WordPress provides wp_nonce_field() and check_admin_referer() to mitigate CSRF, and esc_html() / esc_attr() for output encoding. The vulnerable W3P SEO code paths do not enforce these controls before version 1.8.6.
Attack Vector
The attack is delivered over the network and requires user interaction. An attacker crafts an HTML page or email containing a hidden form or image tag that auto-submits a POST request to a W3P SEO administrative endpoint. The forged request carries a JavaScript payload in a parameter the plugin stores without sanitization. The Patchstack advisory documents the affected endpoints. See the Patchstack WordPress Vulnerability Report for technical details.
Detection Methods for CVE-2024-51684
Indicators of Compromise
- Unexpected <script> tags or event handler attributes (onerror, onload) stored in W3P SEO plugin options or post metadata
- WordPress admin users reporting unexplained redirects, popups, or new admin accounts created without authorization
- Outbound HTTP requests from administrator browsers to unfamiliar domains shortly after visiting external links
Detection Strategies
- Audit the wp_options table and plugin-specific tables for values containing <script>, javascript:, or encoded variants such as %3Cscript%3E
- Review web server access logs for POST requests to wp-admin endpoints originating from cross-origin Referer headers
- Compare installed plugin version against 1.8.6 across all managed WordPress sites
Monitoring Recommendations
- Alert on creation of new administrator accounts or modification of user roles outside change windows
- Monitor file integrity for unexpected changes under wp-content/plugins/wp-perfect-plugin/
- Track outbound DNS and HTTP traffic from administrator workstations to newly observed domains
How to Mitigate CVE-2024-51684
Immediate Actions Required
- Update the W3P SEO plugin to a version later than 1.8.6 as soon as a fixed release is available from the vendor
- If no patched version is available, deactivate and remove wp-perfect-plugin from affected WordPress installations
- Force a password reset and invalidate active sessions for all administrator accounts
- Review database content for persisted XSS payloads and remove any malicious entries
Patch Information
Versions through < 1.8.6 are affected. Refer to the Patchstack WordPress Vulnerability Report for the current patch status and upgrade guidance from the plugin maintainer.
Workarounds
- Restrict access to /wp-admin/ paths by source IP using web server ACLs or a web application firewall
- Enforce strict Referer and Origin header validation at the WAF for state-changing admin requests
- Require administrators to use a separate browser profile or session-isolated browser when managing WordPress sites
- Apply a Content Security Policy (CSP) that disallows inline scripts in the admin interface where feasible
# Example: identify the vulnerable plugin version via WP-CLI
wp plugin get wp-perfect-plugin --field=version
# Deactivate and remove the plugin until a fixed version is installed
wp plugin deactivate wp-perfect-plugin
wp plugin delete wp-perfect-plugin
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
