FreshRSS up to 1.26.1 code injection

Summaryinfo

A vulnerability marked as critical has been reported in FreshRSS up to 1.26.1. Affected by this issue is some unknown functionality. The manipulation leads to code injection. This vulnerability is traded as CVE-2025-54593. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in FreshRSS up to 1.26.1. This issue affects an unknown code. The manipulation with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

FreshRSS is a free, self-hostable RSS aggregator. In versions 1.26.1 and below, an authenticated administrator user can execute arbitrary code on the FreshRSS server by modifying the update URL to one they control, and gain code execution after running an update. After successfully executing code, user data including hashed passwords can be exfiltrated, the instance can be defaced when file permissions allow. Malicious code can be inserted into the instance to steal plaintext passwords, among others. This is fixed in version 1.26.2.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-54593 since 07/25/2025. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

Upgrading to version 1.26.2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch dbdadbb4107878d9233f635c31a88afe45957101 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-2025-23380). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• FreshRSS

Version

• 1.26.0
• 1.26.1

License

• open-source

Website

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

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion