CVE-2024-29127: Advanced Access Manager XSS Vulnerability

CVE-2024-29127 Overview

CVE-2024-29127 is a Reflected Cross-Site Scripting (XSS) vulnerability in the AAM Advanced Access Manager plugin for WordPress. The flaw affects all versions up to and including 6.9.20. It stems from improper neutralization of user-supplied input during web page generation, categorized under [CWE-79].

Attackers can craft malicious URLs that, when clicked by an authenticated user, execute arbitrary JavaScript in the victim's browser context. The scope-changed nature of this issue means injected scripts can affect resources beyond the vulnerable component. Successful exploitation can lead to session token theft, unauthorized actions on behalf of the victim, and defacement of administrative interfaces.

Critical Impact
Attackers can hijack authenticated WordPress administrator sessions and perform privileged actions through reflected script execution.

Affected Products

Vasyltech Advanced Access Manager (WordPress plugin) versions through 6.9.20
WordPress sites running the AAM plugin without the applied patch
Administrative and user-facing pages that render unsanitized request parameters

Discovery Timeline

2024-03-19 - CVE-2024-29127 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-29127

Vulnerability Analysis

The vulnerability resides in the Advanced Access Manager plugin's handling of HTTP request parameters. User-controlled input is echoed back into rendered HTML responses without proper output encoding or sanitization. This enables reflected XSS, where the malicious payload travels in the request and is immediately reflected in the response.

Because the scope changes when the payload executes, injected JavaScript can reach data and functionality outside the vulnerable component's security boundary. User interaction is required, typically in the form of a victim clicking a crafted link. The attack requires no privileges on the target site, making phishing-based delivery straightforward.

Refer to the Patchstack Vulnerability Report for the specific parameter and code path.

Root Cause

The root cause is missing or insufficient output escaping when rendering request data in HTML contexts. WordPress provides helper functions such as esc_html(), esc_attr(), and wp_kses() for context-aware sanitization. The affected plugin code paths did not apply these routines consistently before echoing parameter values into administrative pages.

Attack Vector

An attacker crafts a URL pointing to a vulnerable Advanced Access Manager endpoint with a JavaScript payload embedded in a request parameter. The attacker delivers the URL through phishing email, chat, or a malicious website. When an authenticated WordPress user clicks the link, the browser executes the reflected script under the trust boundary of the WordPress site. The payload can exfiltrate cookies, capture form data, or issue authenticated requests to plugin management endpoints.

No verified public exploit code is available. See the Patchstack Vulnerability Report for additional technical detail.

Detection Methods for CVE-2024-29127

Indicators of Compromise

HTTP request logs containing <script>, javascript:, onerror=, or encoded variants in query parameters targeting AAM plugin endpoints
Referer headers originating from external domains preceding administrative plugin requests
Unexpected outbound requests from authenticated administrator sessions shortly after visiting a crafted URL
Web server access logs showing long or URL-encoded parameter values passed to AAM plugin pages

Detection Strategies

Deploy a Web Application Firewall (WAF) with signatures for reflected XSS patterns targeting WordPress plugins
Inspect access logs for AAM plugin request URIs containing HTML tags or JavaScript event handlers in parameters
Correlate administrator login events with subsequent anomalous browser-originated API calls to plugin endpoints
Enable Content Security Policy (CSP) reporting to surface inline script violations on WordPress admin pages

Monitoring Recommendations

Alert on WordPress wp-admin requests containing suspicious script fragments in query strings
Track version inventory of the Advanced Access Manager plugin across managed WordPress installations
Monitor administrator session cookies for use from unexpected IP addresses or user agents
Forward WordPress and web server logs to a centralized analytics platform for correlation across sites

How to Mitigate CVE-2024-29127

Immediate Actions Required

Update the Advanced Access Manager plugin to a version later than 6.9.20 as soon as a patched release is available
Audit WordPress administrator accounts for unfamiliar sessions and force password resets for privileged users
Deploy WAF rules that block reflected XSS payloads targeting AAM plugin endpoints
Rotate WordPress secret keys in wp-config.php if administrator session compromise is suspected

Patch Information

Consult the Patchstack Vulnerability Report for the fixed version and vendor guidance. Apply the update through the WordPress admin plugin manager or via WP-CLI using wp plugin update advanced-access-manager.

Workarounds

Restrict access to WordPress wp-admin by source IP address using web server or firewall rules until the plugin is patched
Enforce a strict Content Security Policy that disallows inline scripts and untrusted script sources
Deactivate the Advanced Access Manager plugin if the patched version cannot be applied promptly
Train administrators to avoid clicking untrusted links while authenticated to WordPress

bash

# Configuration example: update the plugin via WP-CLI
wp plugin update advanced-access-manager
wp plugin list --name=advanced-access-manager --fields=name,status,version