CVE-2024-54226 Overview
CVE-2024-54226 is a Cross-Site Request Forgery (CSRF) vulnerability in the karlkiesinger Country Blocker WordPress plugin. The flaw affects all versions up to and including 3.2. Successful exploitation allows attackers to chain CSRF with Stored Cross-Site Scripting (XSS), resulting in persistent script injection inside the WordPress administration interface. The weakness is tracked under CWE-352: Cross-Site Request Forgery. Attackers exploit the issue remotely over the network and require an administrator to interact with a crafted request, typically by visiting a malicious page while authenticated.
Critical Impact
Attackers can trick authenticated administrators into submitting forged requests that store malicious JavaScript in the plugin's configuration, leading to persistent XSS execution against any user who views the affected admin page.
Affected Products
- karlkiesinger Country Blocker plugin for WordPress
- All versions from initial release through 3.2
- WordPress sites running the vulnerable plugin
Discovery Timeline
- 2024-12-09 - CVE-2024-54226 published to NVD
- 2026-04-23 - Last updated in NVD database
Technical Details for CVE-2024-54226
Vulnerability Analysis
The Country Blocker plugin exposes administrative actions without validating request authenticity. State-changing endpoints accept POST requests but do not verify a WordPress nonce or anti-CSRF token. An attacker hosts a crafted page containing an auto-submitting form or fetch request that targets the plugin's settings endpoint. When an authenticated administrator visits that page, the browser submits the request with valid session cookies. The plugin processes the input and stores attacker-controlled values without sufficient output encoding. The stored payload then renders inside the WordPress admin context, executing JavaScript in the browser of any administrator who loads the affected page.
Root Cause
The root cause is the absence of CSRF protection on plugin configuration handlers, combined with insufficient sanitization of stored input. WordPress provides the wp_nonce_field() and check_admin_referer() primitives for protecting privileged actions, and wp_kses() or esc_attr() for safe output. The vulnerable code paths omit these controls, allowing forged requests to write unsanitized values that are later echoed into HTML.
Attack Vector
Exploitation requires no authentication on the attacker side but does require user interaction from an authenticated administrator. The attacker delivers a link or embeds a hidden form on a controlled site. The administrator's authenticated session submits the forged request to wp-admin. The Stored XSS payload persists in the database and triggers every time the admin page loads. See the Patchstack advisory for technical details.
Detection Methods for CVE-2024-54226
Indicators of Compromise
- Unexpected <script> tags, event handlers, or JavaScript URIs stored in Country Blocker plugin options within the wp_options table.
- WordPress admin sessions originating from external referrers immediately before configuration changes to the plugin.
- New or modified administrator accounts created shortly after an admin visited an untrusted external page.
Detection Strategies
- Review the wp_options rows associated with the Country Blocker plugin for HTML or JavaScript content that should not appear in configuration values.
- Inspect web server access logs for POST requests to admin.php or options.php referencing the plugin without a matching prior GET to the settings page.
- Monitor browser-side error reports and Content Security Policy violations from /wp-admin/ pages that load plugin settings.
Monitoring Recommendations
- Enable WordPress audit logging to capture plugin setting changes with user, IP, and referrer attribution.
- Alert on outbound requests from administrator browsers to unknown domains that coincide with plugin configuration writes.
- Track file integrity and database option changes for the Country Blocker plugin namespace.
How to Mitigate CVE-2024-54226
Immediate Actions Required
- Update the Country Blocker plugin to a version above 3.2 once a patched release is available from the maintainer.
- If no patched version exists, deactivate and remove the plugin from all WordPress installations.
- Audit stored plugin settings and remove any HTML or script content injected into configuration fields.
Patch Information
The vendor advisory is published via Patchstack. Administrators should monitor the WordPress plugin repository for an updated release that adds nonce verification and input sanitization. Until a fix is published, removal is the only complete mitigation.
Workarounds
- Deploy a Web Application Firewall (WAF) rule that requires a valid WordPress nonce on POST requests to the plugin's admin endpoints.
- Restrict access to /wp-admin/ by IP allowlist so that forged requests from external networks cannot reach configuration handlers.
- Require administrators to use separate browsers or browser profiles for WordPress administration to reduce session reuse from untrusted sites.
# Configuration example: disable the vulnerable plugin via WP-CLI
wp plugin deactivate country-blocker
wp plugin delete country-blocker
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
