CVE-2026-28812

CRITICAL CVSS 3.1: 9.8 EPSS 0.40%
Updated Aug 05, 2026
Apache Software Foundation
Parameter Value
CVSS 9.8 (CRITICAL)
Affected Versions before 2.12.4
Fixed In 2.12.4
Type CWE-290
Vendor Apache Software Foundation
Public PoC No

UserManager lack of checks allows impersonation in Apache JSPWiki up to 2.12.3 which may allow attackers to escalate privileges. Users are recommended to upgrade to version 2.12.4 or newer which fixes this issue.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Apache Jspwiki
cpe:2.3:a:apache:jspwiki:*:*:*:*:*:*:*:*
2.12.4