GetSimple CMS up to 3.3.22 Gsconfig Editor gsconfig.php cross-site request forgery

Summaryinfo

A vulnerability, which was classified as problematic, has been found in GetSimple CMS up to 3.3.22. This impacts an unknown function of the file gsconfig.php of the component Gsconfig Editor Module. The manipulation leads to cross-site request forgery. This vulnerability is listed as CVE-2026-28495. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in GetSimple CMS up to 3.3.22. This issue affects an unknown functionality of the file gsconfig.php of the component Gsconfig Editor Module. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. Using CWE to declare the problem leads to CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. Impacted is integrity. The summary by CVE is:

GetSimple CMS is a content management system. The massiveAdmin plugin (v6.0.3) bundled with GetSimpleCMS-CE v3.3.22 allows an authenticated administrator to overwrite the gsconfig.php configuration file with arbitrary PHP code via the gsconfig editor module. The form lacks CSRF protection, enabling a remote unauthenticated attacker to exploit this via Cross-Site Request Forgery against a logged-in admin, achieving Remote Code Execution (RCE) on the web server.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-28495 since 02/27/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

By approaching the search of inurl:gsconfig.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Content Management System

Vendor

• GetSimple

Name

• CMS

Version

• 3.3.0
• 3.3.1
• 3.3.2
• 3.3.3
• 3.3.4
• 3.3.5
• 3.3.6
• 3.3.7
• 3.3.8
• 3.3.9
• 3.3.10
• 3.3.11
• 3.3.12
• 3.3.13
• 3.3.14
• 3.3.15
• 3.3.16
• 3.3.17
• 3.3.18
• 3.3.19
• 3.3.20
• 3.3.21
• 3.3.22

License

• free

CPE 2.3info

• 🔒
• 🔒
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CPE 2.2info

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• 🔒
• 🔒

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Be aware that VulDB is the high quality source for vulnerability data.

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