CVE-2024-49629: Endless Posts Navigation CSRF Vulnerability

CVE-2024-49629 Overview

CVE-2024-49629 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] in the Fahad Mahmood Endless Posts Navigation plugin for WordPress. The flaw affects all versions of endless-posts-navigation up to and including 2.2.7. An attacker who tricks an authenticated administrator into visiting a crafted page can perform state-changing actions that inject stored Cross-Site Scripting (XSS) payloads into the site. Once stored, the script executes in the browser of any user who loads the affected page, enabling session theft, content defacement, or drive-by redirection.

Critical Impact

A single click by an authenticated administrator on an attacker-controlled link can result in persistent JavaScript execution against every visitor of the WordPress site.

Affected Products

• Fahad Mahmood Endless Posts Navigation (WordPress plugin) versions up to and including 2.2.7
• WordPress sites running the vulnerable plugin under the androidbubbles:endless_posts_navigation component
• Any downstream WordPress installation that has not upgraded past version 2.2.7

Discovery Timeline

• 2024-10-20 - CVE-2024-49629 published to the National Vulnerability Database
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-49629

Vulnerability Analysis

The vulnerability chains two weaknesses. The plugin exposes a state-changing endpoint that does not validate an anti-CSRF nonce, and it accepts user-supplied input that is later rendered without sufficient output encoding. The combined behavior converts a CSRF primitive into a stored XSS primitive.

An attacker hosts a malicious page containing a form or fetch call targeting the plugin's settings handler. When an authenticated administrator visits the page, the browser submits the request using the administrator's session cookie. The plugin processes the request and persists attacker-controlled markup. Any subsequent page load that renders the stored value executes the injected script in the visitor's browser context.

The impact is limited to confidentiality and integrity of data accessible to the affected browser session, with no direct impact on availability. Because the scope changes across the WordPress trust boundary, the payload can affect users other than the abused administrator.

Root Cause

The root cause is missing CSRF protection on a privileged plugin endpoint, compounded by missing input sanitization and output escaping. WordPress provides wp_nonce_field(), check_admin_referer(), and escaping helpers such as esc_attr() and wp_kses_post(), but these controls are not enforced on the vulnerable code path.

Attack Vector

Exploitation requires network access to lure an authenticated administrator to an attacker-controlled URL. The attack requires user interaction but no privileges on the target site. Details are documented in the Patchstack Vulnerability Overview.

No public proof-of-concept exploit is currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2024-49629

Indicators of Compromise

• Unexpected <script>, onerror=, or onload= fragments stored in plugin configuration rows within the wp_options table.
• WordPress administrator sessions submitting POST requests to endless-posts-navigation handlers with an HTTP Referer pointing to an external domain.
• New or modified administrator accounts created shortly after a settings change to the Endless Posts Navigation plugin.

Detection Strategies

• Review web server access logs for cross-origin POST requests to wp-admin/admin.php or admin-ajax.php containing endless-posts-navigation parameters.
• Inspect rendered pages for stored payloads by scanning HTML output for script tags introduced by plugin-managed fields.
• Correlate authenticated administrator activity with outbound browser navigations to untrusted domains that precede plugin setting changes.

Monitoring Recommendations

• Enable audit logging on the WordPress site using a plugin that records option updates and user setting changes.
• Alert on modifications to plugin settings that occur outside of expected administrative maintenance windows.
• Monitor Content Security Policy (CSP) violation reports for inline script execution originating from plugin-rendered pages.

How to Mitigate CVE-2024-49629

Immediate Actions Required

• Upgrade Endless Posts Navigation to a version newer than 2.2.7 as soon as the vendor releases a fix.
• If no fixed version is available, deactivate and remove the plugin from all affected WordPress sites.
• Rotate administrator passwords and invalidate active sessions if suspicious plugin configuration changes are found.

Patch Information

The vendor advisory listed in the enriched data references the Patchstack Vulnerability Overview. Consult that entry for the current patched version and upgrade guidance from the plugin maintainer.

Workarounds

• Deploy a Web Application Firewall (WAF) rule that blocks cross-origin POST requests to endless-posts-navigation endpoints without a valid WordPress nonce.
• Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins.
• Require administrators to use a dedicated browser profile for WordPress administration to reduce cross-site request exposure.

# Configuration example: enforce a restrictive Content Security Policy at the web server
# Apache (.htaccess)
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'"

# Nginx
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'" always;