CVE-2026-28556

wpForo Forum 2.4.14 Missing Authorization via Topic Management Form Handlers

MEDIUM
5.4
CVSS Score
Published: February 28, 2026 at 09:47 PM UTC
Updated: June 17, 2026 at 10:28 AM UTC
1 product affected across 1 vendorwpForo Forum

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

wpForo Forum· Gvectorswordpress-plugin
95%
2.4 ≤ v < 2.4.162.4.0 ≤ v < 2.4.162.4
Vendor states this is fixed in 2.4.16 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-862

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