Vulnerability Details CVE-2026-28556
wpForo Forum 2.4.14 contains a missing authorization vulnerability that allows authenticated subscribers to move, merge, or split any forum topic via the topic_move, topic_merge, and topic_split form action handlers. Attackers with a valid form nonce can reorganize arbitrary forum content without moderator permissions, including relocating topics to private forums.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 12.6%
CVSS Severity
CVSS v3 Score 5.4
References
Products affected by CVE-2026-28556
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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