CVE-2026-28812: Apache Jspwiki

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Apache Jspwiki: before 2.12.4 (fixed in 2.12.4)

Published 2026-07-30. Last modified 2026-08-05.