WordPress security changelog
MEDIUM CVE-2026-4091 Deferred

OPEN-BRAIN: Cross-site request forgery

OPEN-BRAIN is affected by cross-site request forgery. The vulnerable path is reachable without authentication. Exploitation relies on a signed-in privileged user submitting an attacker-controlled request. The published affected range is <= 0.5.0.

CVE / CNA score 6.1 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
OPEN-BRAIN
Plugin slug
open-brain
Affected
<= 0.5.0
Safe version
> 0.5.0
Published
Apr 15, 2026
Weakness
CWE-352 — Cross-Site Request Forgery (CSRF)

This CVE was published Apr 15, 2026 and is one of 2 known issues for this plugin.

What to do

Update, patch or deactivate.

Update OPEN-BRAIN to a release after 0.5.0, or disable and remove it until a fixed version is available.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical 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.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Primary and upstream sources