CVE-2026-13158 Everest Toolkit <= 1.2.3 - Admin+ Arbitrary File Upload
Administrators can upload executable PHP files via demo-content import due to disabled file-type validation, leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-13158?
CVE-2026-13158 is a high-severity vulnerability in Unknown Everest Toolkit, published on 1 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Everest Toolkit WordPress plugin through 1.2.3 does not validate the type of files uploaded during demo-content import (the WordPress file-type test is disabled), allowing high-privilege users (Administrator by default, including non-super-admin site administrators on multisite) to upload executable PHP files to the uploads directory.
Weakness: CWE-434
Which versions are affected by CVE-2026-13158?
How do I fix CVE-2026-13158?
No fix has been published for CVE-2026-13158 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-13158 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13158 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-gv5c-hx24-mwv4.