CVE-2025-54875: FreshRSS: Unauthorized creation of admin user when registration is enabled

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-09-29 · updated 2026-10-19
Weakness: CWE-284

Description

FreshRSS is a free, self-hostable RSS aggregator. In versions 1.16.0 and above through 1.26.3, an unprivileged attacker can create a new admin user when registration is enabled through the use of a hidden field used only in the user management admin page, new_user_is_admin. This is fixed in version 1.27.0.

Affected products

FreshRSS: from 1.16.0 before 1.27.0 — fixed in 1.27.0

How to fix

Upgrade to a fixed version: FreshRSS 1.27.0. Check the vendor advisory for mitigations.

References

https://github.com/FreshRSS/FreshRSS/pull/7783
https://github.com/FreshRSS/FreshRSS/releases/tag/1.27.0
https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-h625-ghr3-jppq
https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-h625-ghr3-jppq

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