CVE-2026-28556: Gvectors Wpforo Forum

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Gvectors Wpforo Forum: from 2.4.0, before 2.4.16 (fixed in 2.4.16)

Published 2026-02-28. Last modified 2026-06-17.