CVE-2026-28557 PUBLISHED

wpForo Forum 2.4.14 Privilege Escalation via Role Synchronization Handler

Assigner: VulnCheck
Reserved: 28.02.2026 Published: 28.02.2026 Updated: 28.02.2026

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.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS Score: 7.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS Score: 6.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	gVectors Team
Product	wpForo Forum
Versions	Default: unaffected affected from 2.4 to 2.4.16 (excl.) Version 2.4.16 is unaffected

CVE-2026-28557 PUBLISHED

wpForo Forum 2.4.14 Privilege Escalation via Role Synchronization Handler

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Credits

References

Problem Types