CVE-2024-54409 Overview
CVE-2024-54409 is a Cross-Site Request Forgery (CSRF) vulnerability in the XPD Reduce Image Filesize WordPress plugin developed by fzmaster. The flaw affects all versions up to and including 1.0. An attacker can craft a malicious request that, when triggered by an authenticated administrator, results in Stored Cross-Site Scripting (XSS) on the WordPress site. The weakness is classified as [CWE-352] Cross-Site Request Forgery. Exploitation requires user interaction, typically by luring a logged-in administrator to click a link or visit a page under attacker control.
Critical Impact
A successful attack stores attacker-controlled JavaScript in the WordPress site, allowing persistent script execution against any user who views the affected page.
Affected Products
- XPD Reduce Image Filesize WordPress plugin (xpd-reduce-image-filesize) versions up to and including 1.0
- WordPress installations with the vulnerable plugin enabled
- Administrative users authenticated to the affected WordPress site
Discovery Timeline
- 2024-12-16 - CVE-2024-54409 published to the National Vulnerability Database
- 2026-06-17 - Last updated in the NVD database
Technical Details for CVE-2024-54409
Vulnerability Analysis
The xpd-reduce-image-filesize plugin exposes one or more state-changing actions that do not validate the origin of incoming requests. The plugin fails to verify a WordPress nonce or other anti-CSRF token before accepting input that is later rendered in the administrative interface. Because the stored input is not sanitized or output-encoded, an attacker can inject JavaScript that executes in the browser of any administrator who views the affected page. The chain combines CSRF for delivery with Stored XSS for execution, expanding the impact beyond a single victim session.
Root Cause
The root cause is the absence of CSRF token verification on plugin endpoints that write attacker-controllable data to the database. Standard WordPress mitigations such as check_admin_referer() and wp_verify_nonce() are not enforced. Compounding this, output rendering does not apply context-appropriate escaping such as esc_html() or esc_attr(), allowing the stored payload to break out of its HTML context and execute as script.
Attack Vector
The vulnerability is exploitable over the network with user interaction. An attacker hosts a page containing a hidden form or JavaScript that submits a forged request to the vulnerable plugin endpoint. When an authenticated WordPress administrator visits that page, the browser submits the request with valid session cookies. The plugin processes the request and stores the malicious payload. The payload then executes when an administrator subsequently loads the affected plugin page, enabling session theft, privilege abuse, or further site compromise.
No verified proof-of-concept code is available. See the Patchstack WordPress Vulnerability Report for additional technical detail.
Detection Methods for CVE-2024-54409
Indicators of Compromise
- Unexpected <script> tags, event handlers, or encoded JavaScript stored in plugin settings or options tied to xpd-reduce-image-filesize.
- HTTP POST requests to plugin endpoints with Referer headers pointing to external domains.
- Administrator browser sessions making unexpected outbound requests after viewing plugin admin pages.
Detection Strategies
- Inspect the wp_options table and plugin-specific tables for values containing HTML or JavaScript content.
- Review web server access logs for requests to xpd-reduce-image-filesize paths lacking a valid _wpnonce parameter.
- Deploy a web application firewall rule to flag cross-origin form submissions targeting wp-admin endpoints.
Monitoring Recommendations
- Enable WordPress audit logging to track changes to plugin settings and administrator activity.
- Monitor for new or modified administrator accounts following any suspected CSRF event.
- Alert on outbound network traffic from administrative browser sessions to unfamiliar domains.
How to Mitigate CVE-2024-54409
Immediate Actions Required
- Deactivate and remove the XPD Reduce Image Filesize plugin until a patched version is published by the vendor.
- Audit the WordPress database for stored script content injected into plugin-related records and remove malicious entries.
- Rotate administrator passwords and invalidate active sessions if exploitation is suspected.
- Review user accounts for unauthorized privilege changes or new administrator entries.
Patch Information
No vendor patch is referenced in the NVD entry for CVE-2024-54409 at the time of publication. The affected version range covers all releases up to and including 1.0. Administrators should consult the Patchstack WordPress Vulnerability Report for any subsequent fix availability.
Workarounds
- Remove the plugin entirely and use an alternative image optimization plugin that enforces nonce verification and output escaping.
- Restrict access to wp-admin by IP allowlist to reduce the attack surface for CSRF delivery.
- Require administrators to use separate browser profiles or sessions when performing WordPress administration to limit exposure to attacker-controlled pages.
- Deploy a web application firewall ruleset that blocks cross-origin POST requests to WordPress administrative endpoints lacking a valid _wpnonce parameter.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
