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Wpforo Forum CVE-2026-28557

MEDIUM
Missing Authorization (CWE-862)
2026-02-28 disclosure@vulncheck.com
WordPress Wpforo Forum
6.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Feb 28, 2026 - 22:16 nvd
MEDIUM 6.5

DescriptionCVE.org

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.

AnalysisAI

Unauthorized usergroup reassignment in wpForo Forum 2.4.14 allows any authenticated user to remap all forum usergroups to arbitrary WordPress roles through a missing capability check in the wpforo_synch_roles AJAX handler. An attacker can obtain a valid nonce from the publicly accessible usergroups admin page and execute bulk privilege escalation affecting all forum users. …

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Vulnerability AssessmentAI

Risk Assessment CVSS 6.5 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker (requires authentication) could exploit this vulnerability to trigger bulk wpForo usergroup reassignment via the wpforo_synch_roles AJAX handl.
Remediation Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-28557 vulnerability details – vuln.today
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