CVE-2026-107508 Ultimate Multisite < 2.17.2 - Unauthenticated LFI via 'attributes' Parameter
Unauthenticated attackers can read arbitrary local files, including configuration files, via the attributes parameter in Ultimate Multisite.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-107508?
CVE-2026-107508 is a high-severity path traversal vulnerability in Unknown Ultimate Multisite, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Ultimate Multisite WordPress plugin before 2.17.2 does not validate a user-supplied value used to select a file to include, allowing unauthenticated attackers to include and read arbitrary local files, including the WordPress configuration file.
Weakness: CWE-22
Which versions are affected by CVE-2026-107508?
How do I fix CVE-2026-107508?
No fix has been published for CVE-2026-107508 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-107508 being exploited?
There is no known exploitation of CVE-2026-107508 in the wild and no public exploit code.
Sources
Also known as GHSA-xwr4-4p99-jhp5.