EUVD-2026-37978
GHSA-h883-4576-v3x4
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Network-reachable AJAX endpoint; PR:L because subscriber-level session required; I:L only since impact is limited to listing image modification with no confidentiality or availability consequence.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
Lifecycle Timeline
2DescriptionCVE.org
The Classified Listing - Classified ads & Business Directory plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 5.4.2. This is due to a missing capability/ownership check on the gallery_image_update_as_feature AJAX handler (action: rtcl_fb_gallery_image_update_as_feature), which accepts a user-supplied listing ID and attachment ID and sets the featured image of a listing while only validating a nonce that is exposed to any logged-in user on the frontend listing-submission form. This makes it possible for authenticated attackers, with Subscriber-level access and above, to change the featured image of arbitrary listings they do not own.
AnalysisAI
Missing authorization in the Classified Listing WordPress plugin (versions through 5.4.2) allows authenticated attackers with Subscriber-level accounts to overwrite the featured image of any listing on the site, regardless of ownership. The vulnerability originates in the rtcl_fb_gallery_image_update_as_feature AJAX handler, which accepts arbitrary user-supplied listing IDs and attachment IDs while relying solely on a nonce that is freely accessible to all logged-in frontend users - providing no meaningful access barrier for low-privilege accounts. No public exploit code has been identified at time of analysis, and this vulnerability does not appear in CISA KEV.
Technical ContextAI
The affected product is the Classified Listing - AI-Powered Classified Ads & Business Directory WordPress plugin by TechlabPro, identified in CPE as cpe:2.3:a:techlabpro1:classified_listing_-_ai-powered_classified_ads_&_business_directory:*:*:*:*:*:*:*:*. The vulnerability is rooted in CWE-862 (Missing Authorization), a class of flaw where security-sensitive operations lack proper capability or ownership checks before execution. Specifically, the gallery_image_update_as_feature AJAX handler (WordPress action rtcl_fb_gallery_image_update_as_feature) in FormBuilderAjax.php (lines 590, 605, and 617) validates only a WordPress nonce to confirm the request originates from a logged-in session, but never verifies whether the requesting user owns or has edit rights over the target listing. Because the nonce is embedded in the frontend listing-submission form visible to all authenticated users, it provides authentication confirmation but not authorization enforcement. This is a classic IDOR-adjacent missing authorization flaw at the AJAX layer of a WordPress plugin.
RemediationAI
WordPress site administrators should update the Classified Listing plugin to the version immediately following 5.4.2 as released by TechlabPro1 via the WordPress.org plugin repository (https://wordpress.org/plugins/classified-listing/). A code-level patch is referenced via SVN changeset 3571741 at https://plugins.trac.wordpress.org/changeset?reponame=&new=3571741%40classified-listing&old=3571741%40classified-listing; however, the exact patched release version number has not been independently confirmed from available data and should be verified against the plugin's changelog before upgrading. As a compensating control where patching is not immediately possible, administrators can restrict WordPress user registration to limit exposure to the Subscriber-level access requirement - disabling open registration eliminates the untrusted-user attack surface entirely. Web application firewall rules blocking AJAX requests to action=rtcl_fb_gallery_image_update_as_feature from non-owner accounts can provide an additional layer of defense, though ownership context enforcement at the WAF layer is non-trivial. The Wordfence advisory at https://www.wordfence.com/threat-intel/vulnerabilities/id/5f7660ba-c3be-44f0-91cb-809d0021759a should be monitored for patched version confirmation.
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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