FreshRSS up to 1.27.0 Language input validation

Summaryinfo

A vulnerability identified as critical has been detected in FreshRSS up to 1.27.0. Impacted is an unknown function. This manipulation of the argument Language causes input validation. This vulnerability appears as CVE-2025-58173. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in FreshRSS up to 1.27.0. Affected by this vulnerability is some unknown functionality. The manipulation of the argument language with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

FreshRSS is a self-hosted RSS feed aggregator. In versions 1.23.0 through 1.27.0, using a path traversal inside the `language` user configuration parameter, it's possible to call `install.php` and perform various administrative actions as an unprivileged user. These actions include logging in as the admin, creating a new admin user, or set the database to an attacker-controlled MySQL server and abuse it to execute code in FreshRSS by setting malicious feed `curl_params` inside the `feed` table. Version 1.27.1 fixes the issue.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-58173 since 08/27/2025. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.27.1 eliminates this vulnerability. Applying the patch 79604aa4b3051f083d1734bd9e82c6a89d785c5a 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
• 1.27.0

License

• open-source

Website

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

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