CVE-2026-80180: Apache Allura: Stored XSS via markdown HTML processing

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-04 · updated 2026-09-08
Weakness: CWE-79

Description

Stored XSS via markdown HTML processing in Apache Allura. This issue affects Apache Allura: from through 1.20.0. Users are recommended to upgrade to version 1.21.0, which fixes the issue.

Affected products

Apache Software Foundation Apache Allura: through 1.20.0

References

https://lists.apache.org/thread/rjo2hjhp76qhl9f3br8jq909mohvzkpq
http://www.openwall.com/lists/oss-security/2026/09/03/3

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