Privilege Escalation Vulnerability in wpForo Forum by wpForo
CVE-2026-28557

7.1HIGH

Key Information:

Vendor

WordPress
Status
WPforo Forum
Vendor
CVE Published:
28 February 2026

What is CVE-2026-28557?

A missing capability check in wpForo Forum version 2.4.14 allows authenticated users to exploit the wpforo_synch_roles AJAX handler. By accessing the usergroups admin page, which is open to any authenticated user, attackers can retrieve a nonce and subsequently remap all wpForo usergroups to any WordPress role. This significant flaw poses a risk to user permissions and could lead to unauthorized access and privilege escalation within WordPress sites.

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Affected Version(s)

wpForo Forum 2.4 < 2.4.16

wpForo Forum 2.4.16

References

https://wordpress.org/plugins/wpforo/
product
https://wordpress.org/plugins/wpforo/#developers
patch
https://www.vulncheck.com/advisories/wpforo-forum-privile...
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Scott Moore - VulnCheck
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