CVE-2026-17540 Bit File Manager < 6.9.1 - Subscriber+ Arbitrary File Read and Deletion via Connector Command Request-Source Mismatch
Authenticated subscribers can read and delete arbitrary files in the WordPress installation, leading to information disclosure and denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-17540?
CVE-2026-17540 is a high-severity missing authorization vulnerability in Unknown File Manager, published on 10 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-284
Which versions are affected by CVE-2026-17540?
How do I fix CVE-2026-17540?
No fix has been published for CVE-2026-17540 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-17540 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-17540 exists.
Public exploit code: 1 Nuclei template.
Sources
Also known as GHSA-mr78-php7-96p9.