FreshRSS up to 1.26.x Setting theme path traversal

Summaryinfo

A vulnerability was found in FreshRSS up to 1.26.x and classified as critical. The impacted element is an unknown function of the component Setting Handler. Executing a manipulation of the argument theme can lead to path traversal. The identification of this vulnerability is CVE-2025-61586. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in FreshRSS up to 1.26.x and classified as critical. This vulnerability affects an unknown code of the component Setting Handler. The manipulation of the argument theme with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

FreshRSS is a free, self-hostable RSS aggregator. Versions 1.26.3 and below are vulnerable to directory enumeration by setting path in theme field, allowing attackers to gain additional information about the server by checking if certain directories exist. This issue is fixed in version 1.27.0.

The advisory is shared for download at github.com. This vulnerability was named CVE-2025-61586 since 09/26/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 1.27.0 eliminates this vulnerability. Applying the patch 6549932d59aef3b72a9da29294af0f30ffb77af5 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.

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Productinfo

Name

• FreshRSS

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26

License

• open-source

Website

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

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