CVE-2026-28557

wpForo Forum < 2.4.16 Privilege Escalation via Role Synchronization Handler

State: Published
Severity: 7.1 High
Published: Feb 28, 2026
Updated: May 25, 2026
Reserved: Feb 28, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N	VulnCheck
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N	VulnCheck

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
wpForo ForumgVectors Team	2.4 to before 2.4.16Affected 2.4.16Not affected

References

wpForo Forum WordPress Pluginproduct
wpForo Forum Contributors & Developerspatch
VulnCheck Advisory: wpForo Forum 2.4.14 Privilege Escalation via Role Synchronization Handlerthird-party-advisory

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