# CVE-2026-28814: Apache JSPWiki unauthenticated wiki markup rendering

Source: https://junglewise.ai/threats/cve-2026-28814-apache-jspwiki-unauthenticated-wiki-markup-rendering  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-30. Updated: 2026-07-30  
License: CC BY 4.0 with a link back

CVE-2026-28814 · Severity: info · CVSS 0 · Published 2026-07-30

Apache JSPWiki, a popular open-source wiki engine, contains a security flaw where it fails to properly verify user identity before processing certain commands. This allows an unauthorized person to trick the system into displaying internal information and sensitive data stored within the wiki's variables. Organizations using this software should update to the latest version to prevent potential data exposure.

Technologies: [Apache Software Foundation JSPWiki](https://junglewise.ai/threats/technologies/jspwiki). Vendors: [Apache Software Foundation](https://junglewise.ai/threats/vendors/apache-software-foundation).

## Quick answers

**Is CVE-2026-28814 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-28814 being exploited in the wild.

**How severe is CVE-2026-28814?** Informational severity, with a CVSS score of 0, published 30 July 2026.

**Which products and versions are affected?** Apache Software Foundation JSPWiki up to 2.12.3.

**Is there a fix for CVE-2026-28814?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-28814 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-28814?** Check whether you run Apache Software Foundation JSPWiki at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A vulnerability in Apache JSPWiki (up to version 2.12.3) stems from a lack of authentication when rendering arbitrary wiki markup. An unauthenticated attacker can leverage this to execute specific wiki commands or markup that retrieves and displays the values of JSPWiki internal variables. This could lead to the disclosure of sensitive configuration or session-related data. The issue is resolved in versions 2.12.4 and 3.0.0. While the NVD entry lists the severity as 'info', the original Apache advisory classifies it as 'Critical'.

## Affected products

- Apache Software Foundation JSPWiki up to 2.12.3

## Timeline

- 2026-07-30: disclosed
- 2026-07-30: advisory

## References

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

## Related threats

- [Apache JSPWiki XSS in markdown renderer error processing](https://junglewise.ai/threats/cve-2026-48910-apache-jspwiki-xss-in-markdown-renderer-error-processing)
- [Apache JSPWiki JSON hijacking leading to CSRF](https://junglewise.ai/threats/cve-2026-28813-apache-jspwiki-json-hijacking-leading-to-csrf)
- [Apache JSPWiki privilege escalation in UserManager](https://junglewise.ai/threats/cve-2026-28812-apache-jspwiki-privilege-escalation-in-usermanager)
- [Apache JSPWiki information disclosure in debug messages](https://junglewise.ai/threats/cve-2026-28811-apache-jspwiki-information-disclosure-in-debug-messages)