Cross-site scripting in Apache Allura - CVE-2026-80180
Published: September 3, 2026
Vulnerability identifier: #VU146868
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-80180
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary script code in a victim's browser.
The vulnerability exists due to cross-site scripting in markdown HTML processing when rendering stored markdown content. A remote attacker can inject a specially crafted markdown payload to execute arbitrary script code in a victim's browser.
Affected software
Apache Allura
How to mitigate CVE-2026-80180
Install security update from vendor's website.
Apache Allura - update to 1.21.0