CVE-2026-28556

low-risk

Published 2026-02-28

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.

Do I need to act?

0.03% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 5.4/10 Medium

NETWORK / LOW complexity

Affected Products (1)

Wpforo Forum

Affected Vendors

Gvectors

References (3)

Product https://wordpress.org/plugins/wpforo/

Release Notes https://wordpress.org/plugins/wpforo/#developers

Third Party Advisory https://www.vulncheck.com/advisories/wpforo-forum-missing-authorization-via-topi...

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low-risk

Severity 21/34 · High

Exploitability 0/34 · Minimal

Exposure 5/34 · Minimal