CVE-2026-85081 Multiple elFinder Plugins - DOM-based XSS via postMessage Origin Bypass
Unauthenticated attackers can execute arbitrary JavaScript in admin sessions via DOM-based XSS in WordPress file manager plugins.
- 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-2026-85081?
CVE-2026-85081 is a high-severity cross-site scripting vulnerability in Unknown File Manager, published on 26 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
The File Manager WordPress plugin before 8.0.5, FileOrganizer WordPress plugin before 1.2.1, File Manager Pro WordPress plugin before 2.1.3 do not correctly validate the origin of window messages received by the file browser they load on their admin screens, accepting any origin that is a leading string prefix of the site's own address, which allows an unauthenticated attacker to run arbitrary JavaScript in the session of a logged-in administrator who visits a page under their control.
The defect is in the file-manager library all three bundle, and every version below 2.1.70 carries it. Updating the bundled library closes it.
Weakness: CWE-79
Which versions are affected by CVE-2026-85081?
How do I fix CVE-2026-85081?
No fix has been published for CVE-2026-85081 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-2026-85081 being exploited?
There is no known exploitation of CVE-2026-85081 in the wild and no public exploit code.
Sources
Also known as GHSA-hj83-mg7w-xg78.