CVE-2026-28814: Apache JSPWiki: Pre-Authentication Arbitrary Wiki Markup Rendering

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-30 · updated 2026-10-23
Weakness: CWE-306

Description

Arbitrary Wiki Markup rendering due to lack of authentication in Apache JSPWiki up to 2.12.3 allows attacker to obtain sensitive data stored in JSPWiki variables. Users are recommended to upgrade to version 2.12.4 or 3.0.0, which fixes this issue.

Affected products

Apache Software Foundation Apache JSPWiki: before 2.12.4 — fixed in 2.12.4

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache JSPWiki 2.12.4. Check the vendor advisory for mitigations.

References

https://lists.apache.org/thread/8vv0311bvrrqxsyn913pcwf7pctyk52w
http://www.openwall.com/lists/oss-security/2026/07/30/17

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