CVE-2024-11254: AMP for WP Reflected XSS Vulnerability

CVE-2024-11254 Overview

CVE-2024-11254 is a Reflected Cross-Site Scripting (XSS) vulnerability in the AMP for WP – Accelerated Mobile Pages plugin for WordPress. The flaw affects all plugin versions up to and including 1.1.1 and stems from insufficient input validation on the disqus_name parameter. Unauthenticated attackers can inject arbitrary web scripts that execute in a victim's browser after the victim clicks a crafted link. The issue is tracked under CWE-79 and was published to the National Vulnerability Database on December 18, 2024.

Critical Impact
Unauthenticated attackers can execute arbitrary JavaScript in the context of a victim's session after tricking the user into clicking a malicious URL, enabling session hijacking, credential theft, and unauthorized actions within WordPress.

Affected Products

AMP for WP – Accelerated Mobile Pages plugin for WordPress, versions up to and including 1.1.1
WordPress sites using the vulnerable Disqus integration component (includes/disqus.html)
Any site exposing the disqus_name parameter to untrusted input

Discovery Timeline

2024-12-18 - CVE-2024-11254 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-11254

Vulnerability Analysis

The vulnerability resides in the Disqus comments integration shipped with the AMP for WP plugin. The disqus_name parameter received via HTTP request is reflected into the rendered page without proper output encoding or input sanitization. An attacker crafts a URL that includes a malicious payload in the disqus_name parameter and delivers it through phishing, forum posts, or social media. When a victim visits the crafted URL, the injected JavaScript executes in the security context of the vulnerable WordPress site.

Because exploitation requires user interaction, the impact is scoped to individual sessions rather than automated mass compromise. However, if an authenticated administrator clicks the crafted link, the attacker can perform actions with administrator privileges, including creating rogue accounts, modifying plugin configuration, or planting persistent web shells.

Root Cause

The root cause is missing input validation and output encoding on the disqus_name parameter inside the Disqus include file (includes/disqus.html). User-supplied data is written directly into the HTML response, allowing HTML and script tags to break out of the intended attribute or text context. Refer to the WordPress plugin source reference for the affected code path.

Attack Vector

Exploitation is network-based and requires no authentication. The attacker crafts a URL targeting an AMP endpoint on the vulnerable site with a JavaScript payload embedded in the disqus_name parameter. The victim must be socially engineered into clicking the link. The scope change in the CVSS vector reflects that injected script can access resources beyond the vulnerable component's security boundary, including cookies and DOM elements belonging to the parent WordPress site.

The vulnerability manifests when the plugin's Disqus template concatenates the untrusted parameter into HTML output. See the Wordfence Vulnerability Report for additional context on the injection point.

Detection Methods for CVE-2024-11254

Indicators of Compromise

HTTP requests containing suspicious values in the disqus_name query parameter, particularly strings with <script, javascript:, onerror=, or URL-encoded equivalents like %3Cscript
Web server access logs showing repeated GET requests to AMP-enabled URLs with unusually long or encoded disqus_name values
WordPress admin activity from unfamiliar IP addresses shortly after a user clicked an external link
Unexpected new administrator accounts, modified plugin files, or altered site options following user interaction with external URLs

Detection Strategies

Deploy web application firewall rules that flag disqus_name parameter values containing HTML tags, event handlers, or script keywords
Monitor referrer headers on WordPress admin sessions to detect navigation originating from crafted external URLs
Use Content Security Policy (CSP) reporting endpoints to capture blocked inline script execution attempts

Monitoring Recommendations

Ingest WordPress access logs and CSP violation reports into a centralized SIEM for correlation with authentication events
Alert on WordPress administrator actions occurring within a short window after an external referrer navigation
Track plugin file integrity for accelerated-mobile-pages directories and alert on unexpected modifications

How to Mitigate CVE-2024-11254

Immediate Actions Required

Update the AMP for WP – Accelerated Mobile Pages plugin to a version later than 1.1.1 as soon as the vendor releases a fixed release
Audit WordPress administrator accounts for unauthorized additions or privilege changes
Force password resets and session invalidation for administrator accounts on affected sites
Review recent plugin, theme, and core file modifications for signs of persistence

Patch Information

At the time of NVD publication, the vulnerability was reported against all versions up to and including 1.1.1. Site administrators should consult the Wordfence Vulnerability Report and the plugin's official WordPress.org page for the latest patched release and apply it through the WordPress plugin management console.

Workarounds

Disable the Disqus integration feature within the AMP for WP plugin settings if a patched version is not yet available
Deactivate the AMP for WP plugin entirely on sites that do not require AMP functionality
Deploy a web application firewall rule to strip or block the disqus_name parameter when it contains HTML or script content
Implement a strict Content Security Policy that disallows inline script execution to reduce exploitability

bash

# Example ModSecurity rule to block script payloads in disqus_name
SecRule ARGS:disqus_name "@rx (?i)(<script|javascript:|onerror=|onload=|%3Cscript)" \
    "id:1002024112,\
    phase:2,\
    deny,\
    status:403,\
    msg:'CVE-2024-11254 XSS attempt in disqus_name parameter',\
    logdata:'Matched value: %{MATCHED_VAR}',\
    tag:'application-multi',\
    tag:'attack-xss'"