Vulnerability Details CVE-2026-28557
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 19.6%
CVSS Severity
CVSS v3 Score 6.5
References
Products affected by CVE-2026-28557
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cpe:2.3:a:gvectors:wpforo_forum:2.4.0
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cpe:2.3:a:gvectors:wpforo_forum:2.4.1
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cpe:2.3:a:gvectors:wpforo_forum:2.4.10
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cpe:2.3:a:gvectors:wpforo_forum:2.4.11
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cpe:2.3:a:gvectors:wpforo_forum:2.4.12
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cpe:2.3:a:gvectors:wpforo_forum:2.4.13
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cpe:2.3:a:gvectors:wpforo_forum:2.4.14
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cpe:2.3:a:gvectors:wpforo_forum:2.4.15
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cpe:2.3:a:gvectors:wpforo_forum:2.4.2
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cpe:2.3:a:gvectors:wpforo_forum:2.4.3
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cpe:2.3:a:gvectors:wpforo_forum:2.4.4
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cpe:2.3:a:gvectors:wpforo_forum:2.4.5
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cpe:2.3:a:gvectors:wpforo_forum:2.4.6
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cpe:2.3:a:gvectors:wpforo_forum:2.4.7
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cpe:2.3:a:gvectors:wpforo_forum:2.4.8
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cpe:2.3:a:gvectors:wpforo_forum:2.4.9