CVE-2026-28557: Missing Authorization in gVectors Team wpForo Forum
wpForo Forum 2.4.14 contains a missing capability check vulnerability that allows authenticated users to trigger bulk wpForo usergroup reassignment via the wpforo_synch_roles AJAX handler. Attackers access the usergroups admin page, accessible to any authenticated user, to obtain a nonce, then remap all wpForo usergroups to arbitrary WordPress roles.
AI Analysis
Technical Summary
CVE-2026-28557 is a missing capability check vulnerability in wpForo Forum 2.4.14. Authenticated users can access the usergroups admin page to obtain a nonce and then invoke the wpforo_synch_roles AJAX handler to bulk reassign usergroups. This lack of authorization allows attackers to remap all wpForo usergroups to arbitrary WordPress roles, potentially escalating privileges or altering user permissions improperly.
Potential Impact
The vulnerability allows authenticated users with low privileges to reassign usergroups in bulk, potentially leading to unauthorized privilege escalation or disruption of user role assignments within the wpForo Forum. This can compromise forum integrity and user access controls.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the usergroups admin page to trusted users only and monitor for suspicious activity related to usergroup reassignment.
CVE-2026-28557: Missing Authorization in gVectors Team wpForo Forum
Description
wpForo Forum 2.4.14 contains a missing capability check vulnerability that allows authenticated users to trigger bulk wpForo usergroup reassignment via the wpforo_synch_roles AJAX handler. Attackers access the usergroups admin page, accessible to any authenticated user, to obtain a nonce, then remap all wpForo usergroups to arbitrary WordPress roles.
CVSS v4.0
Score 7.1high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-28557 is a missing capability check vulnerability in wpForo Forum 2.4.14. Authenticated users can access the usergroups admin page to obtain a nonce and then invoke the wpforo_synch_roles AJAX handler to bulk reassign usergroups. This lack of authorization allows attackers to remap all wpForo usergroups to arbitrary WordPress roles, potentially escalating privileges or altering user permissions improperly.
Potential Impact
The vulnerability allows authenticated users with low privileges to reassign usergroups in bulk, potentially leading to unauthorized privilege escalation or disruption of user role assignments within the wpForo Forum. This can compromise forum integrity and user access controls.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the usergroups admin page to trusted users only and monitor for suspicious activity related to usergroup reassignment.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-02-28T18:54:23.280Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69a3647b32ffcdb8a26ae361
Added to database: 2/28/2026, 9:56:11 PM
Last enriched: 5/26/2026, 7:43:47 AM
Last updated: 5/30/2026, 10:41:07 PM
Views: 120
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