CVE-2026-4091
OPEN-BRAIN <= 0.5.0 - Cross-Site Request Forgery
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.
INFO
Published Date :
April 15, 2026, 9:16 a.m.
Last Modified :
April 22, 2026, 8:23 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-4091
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the OPEN-BRAIN plugin to version 0.5.1 or later.
- Verify nonce checks are implemented for all forms.
- Implement CSRF protection measures.
- Educate users about phishing risks.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-4091.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-4091 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-4091
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-4091 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-4091 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Apr. 15, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Added CWE CWE-352 Added Reference https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L237 Added Reference https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L252 Added Reference https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L253 Added Reference https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L272 Added Reference https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L237 Added Reference https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L252 Added Reference https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L253 Added Reference https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L272 Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/93df6480-9bb1-4f5d-bb39-ff1a01d739cf?source=cve