GeoServer up to 2.24.x SLD_BODY cross site scripting

Summaryinfo

A vulnerability was found in GeoServer up to 2.24.x. It has been rated as problematic. Affected is an unknown function. Performing a manipulation of the argument SLD_BODY results in cross site scripting. This vulnerability is known as CVE-2025-21621. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in GeoServer up to 2.24.x. This affects an unknown function. The manipulation of the argument SLD_BODY with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. The summary by CVE is:

GeoServer is an open source server that allows users to share and edit geospatial data. Prior to version 2.25.0, a reflected cross-site scripting (XSS) vulnerability exists in the WMS GetFeatureInfo HTML output format that enables a remote attacker to execute arbitrary JavaScript code in a victim's browser through specially crafted SLD_BODY parameters. This issue has been patched in version 2.25.0.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2025-21621 since 12/29/2024. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 2.25.0 eliminates this vulnerability. Applying the patch dc9ff1c726dd73c884437a123b4ad72b19383c7d 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-2025-199607). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• GeoServer

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24

License

• open-source

Website

• Product: https://github.com/geoserver/geoserver/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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