grav up to 1.10.x Admin Plugin /admin/config/site cross site scripting

Summaryinfo

A vulnerability was found in grav up to 1.10.x. It has been rated as problematic. This affects an unknown function of the file /admin/config/site of the component Admin Plugin. The manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2025-66308. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in grav up to 1.10.x. It has been rated as problematic. This issue affects an unknown function of the file /admin/config/site of the component Admin Plugin. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

This admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Prior to 1.11.0-beta.1, a Stored Cross-Site Scripting (XSS) vulnerability was identified in the /admin/config/site endpoint of the Grav application. This vulnerability allows attackers to inject malicious scripts into the data[taxonomies] parameter. The injected payload is stored on the server and automatically executed in the browser of any user who accesses the affected site configuration, resulting in a persistent attack vector. This vulnerability is fixed in 1.11.0-beta.1.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-66308 since 11/27/2025. The exploitation is known to be easy. The attack may be initiated remotely. The exploitation requires an enhanced level of successful authentication. 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. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 1.11.0-beta.1 eliminates this vulnerability. Applying the patch 99f653296504f1d6408510dd2f6f20a45a26f9b0 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-200102). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

• grav

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10

License

• open-source

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

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