CVE-2026-28557
Received Received - Intake

Missing Capability Check in wpForo 2.4.14 Enables Usergroup Reassignment

Publication date: 2026-02-28

Last updated on: 2026-03-04

Assigner: VulnCheck

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.

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Meta Information

Published
2026-02-28
Last Modified
2026-03-04
Generated
2026-07-06
AI Q&A
2026-03-01
EPSS Evaluated
2026-07-05
NVD
CVE-2026-28557
EUVD
EUVD-2026-9106

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
gvectors wpforo_forum From 2.4.0 (inc) to 2.4.16 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

The vulnerability in wpForo Forum version 2.4.14 is due to a missing capability check that allows any authenticated user to trigger a bulk reassignment of wpForo usergroups. This is done via the wpforo_synch_roles AJAX handler. Essentially, attackers can access the usergroups admin page, which is accessible to all authenticated users, obtain a security nonce, and then remap all wpForo usergroups to arbitrary WordPress roles.

Impact Analysis

This vulnerability can impact you by allowing an authenticated user to change the roles of all wpForo usergroups to any WordPress roles they choose. This can lead to unauthorized privilege escalation within the forum, potentially allowing users to gain higher permissions than intended, which can compromise the integrity and security of the forum.

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