Medium severity · published Sep 4, 2026
CVE-2026-80180
Apache Allura: Stored XSS via markdown HTML processing
6.1
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AA
Apache Allura · Apache Software Foundation
through 1.20.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-80180
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-80180
lists.apache.org
https://lists.apache.org/thread/rjo2hjhp76qhl9f3br8jq909mohvzkpq
www.openwall.com
http://www.openwall.com/lists/oss-security/2026/09/03/3
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