CVE-2026-4091 OPEN-BRAIN <= 0.5.0 - Cross-Site Request Forgery
Unauthenticated attackers can execute malicious scripts by tricking administrators into clicking a link due to missing nonce verification in the OPEN-BRAIN WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-4091?
CVE-2026-4091 is a medium-severity vulnerability in faridsaniee OPEN-BRAIN, published on 15 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The OPEN-BRAIN plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 0.5.0. This is due to missing nonce verification on the settings form in the func_page_main() function. This makes it possible for unauthenticated attackers to inject malicious web scripts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
Weakness: CWE-352
Which versions are affected by CVE-2026-4091?
How do I fix CVE-2026-4091?
No fix has been published for CVE-2026-4091 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-4091 being exploited?
There is no known exploitation of CVE-2026-4091 in the wild and no public exploit code.
Sources
Also known as GHSA-frwx-4qvw-g6ww.