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CVE-2026-28557

wpForo Forum < 2.4.16 Privilege Escalation via Role Synchronization Handler

Published: Feb 28, 2026Updated: Mar 4, 2026 Sources: CVE List NVDCWE-862
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.3%
Top 81.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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 Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-862

Affected Products

wpForo ForumgVectors Team
Mixed
Web & CMS Plugins / wordpress-plugin
wpforo forumgvectors
Mixed
Web & CMS Plugins / forum-wiki
gvectors teamcommercialWeb & CMS Pluginsaka wpdiscuz, wpforo
gvectorscommercialWeb & CMS Pluginsaka wpforo forum, wpdiscuz

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://wordpress.org/plugins/wpforo/
wordpress.org
https://wordpress.org/plugins/wpforo/#developers
wordpress.org
https://www.vulncheck.com/advisories/wpforo-forum-privilege-escalation-via-role-synchronization-handler
vulncheck.com

Timeline

Published
Feb 28, 2026
Last Updated
Mar 4, 2026

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