CVE-2026-80180 Apache Allura: Stored XSS via markdown HTML processing
Attackers can inject malicious scripts via markdown processing in Apache Allura, potentially stealing user sessions or executing code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-80180?
CVE-2026-80180 is a medium-severity cross-site scripting vulnerability in Apache Allura, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-80180?
How do I fix CVE-2026-80180?
No fix has been published for CVE-2026-80180 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-80180 being exploited?
There is no known exploitation of CVE-2026-80180 in the wild and no public exploit code.
Sources
Also known as GHSA-w8gw-2cgm-wv2h.