CVE-2025-2299: LuckyWP Table of Contents CSRF Vulnerability

CVE-2025-2299 Overview

CVE-2025-2299 is a Cross-Site Request Forgery (CSRF) vulnerability in the LuckyWP Table of Contents plugin for WordPress. The flaw affects all versions up to and including 2.1.10 and stems from missing or incorrect nonce validation on the ajaxEdit function. An unauthenticated attacker can craft a malicious request that, when triggered by an authenticated administrator, injects arbitrary web scripts into the site. Exploitation requires user interaction such as clicking a crafted link. The vulnerability is tracked under [CWE-352] (Cross-Site Request Forgery) and [CWE-79] (Cross-Site Scripting).

Critical Impact
Successful exploitation allows an unauthenticated attacker to inject persistent JavaScript into a WordPress site by tricking an administrator into visiting an attacker-controlled page.

Affected Products

LuckyWP Table of Contents plugin for WordPress, all versions through 2.1.10
WordPress sites with the plugin installed and active
Administrator accounts of sites running the vulnerable plugin

Discovery Timeline

2025-04-03 - CVE-2025-2299 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-2299

Vulnerability Analysis

The LuckyWP Table of Contents plugin exposes the ajaxEdit handler in the EditorBlockController without adequate CSRF protection. WordPress relies on nonce tokens to bind sensitive state-changing AJAX requests to the current user session. When these tokens are missing or improperly verified, any authenticated request that reaches the endpoint is treated as legitimate.

An attacker who hosts a page with a crafted form or fetch request can cause a logged-in administrator's browser to submit a forged POST to the vulnerable endpoint. The plugin then persists attacker-controlled input that is later rendered in the WordPress admin or on the site frontend, yielding stored Cross-Site Scripting. Because the injected payload executes in an administrator's browser context, follow-on actions can include account takeover, plugin manipulation, or pivoting to further server-side abuse.

Root Cause

The root cause is missing or incorrect nonce validation on the ajaxEdit function. Without a check_ajax_referer() or equivalent nonce check tied to the user session, the endpoint accepts cross-origin requests as authoritative. Combined with insufficient output encoding when the stored content is rendered, the flaw chains CSRF into stored XSS.

Attack Vector

Exploitation is network-based and requires user interaction from an administrator. The attacker delivers a crafted URL, form, or malicious page. When the administrator visits the resource while authenticated to the target WordPress site, the browser submits the forged request. Authentication is not required by the attacker, which broadens the pool of potential threat actors. See the WordPress Plugin Source Code and the Wordfence Vulnerability Report for endpoint-level detail.

No public proof-of-concept code is available at the time of publication.

Detection Methods for CVE-2025-2299

Indicators of Compromise

Unexpected <script> tags, event handlers, or obfuscated JavaScript appearing in table-of-contents blocks or plugin-managed post content.
WordPress administrator sessions initiating outbound requests to unfamiliar domains shortly after visiting external links.
New or modified administrator accounts, plugin installations, or theme file changes with no corresponding audit trail entry.

Detection Strategies

Inspect HTTP access logs for POST requests to the plugin's admin-ajax endpoints (specifically the ajaxEdit action) originating from external Referer headers.
Compare current plugin database entries against known-good backups to identify script content injected into stored options or post meta.
Deploy web application firewall rules that require a valid WordPress nonce header on state-changing plugin AJAX calls.

Monitoring Recommendations

Alert on administrator-initiated requests that carry cross-site Referer values to wp-admin/admin-ajax.php.
Monitor WordPress option, postmeta, and plugin-specific tables for content containing HTML script constructs.
Track anomalous administrator behavior such as unusual session sources or plugin editor activity following outbound web navigation.

How to Mitigate CVE-2025-2299

Immediate Actions Required

Update the LuckyWP Table of Contents plugin to a version later than 2.1.10 that incorporates the fix from WordPress Changeset #3265169.
Audit administrator accounts and recently modified posts for injected scripts, and revert unauthorized changes.
Force password resets and invalidate active sessions for administrator accounts if injection is confirmed.

Patch Information

The vendor addressed the issue in the plugin repository via WordPress Changeset #3265169, which introduces nonce validation on the affected AJAX handler. Site owners should upgrade to the latest release available through the WordPress plugin directory.

Workarounds

Deactivate the LuckyWP Table of Contents plugin until the patched version can be installed.
Restrict wp-admin access to trusted IP ranges using web server or WAF rules to reduce administrator exposure to CSRF delivery pages.
Enforce administrator use of isolated browsers or browser profiles that do not share sessions with general web browsing.

bash

# Configuration example: block cross-origin POSTs to admin-ajax.php at the reverse proxy
# nginx snippet — reject admin-ajax POSTs whose Referer is not the site itself
location = /wp-admin/admin-ajax.php {
    if ($request_method = POST) {
        set $csrf_block "1";
        if ($http_referer ~* "^https?://your-site\.example(/|$)") {
            set $csrf_block "0";
        }
        if ($csrf_block = "1") {
            return 403;
        }
    }
    include fastcgi_params;
    fastcgi_pass php_upstream;
}