CVE-2025-62166: FreshRSS has an IDOR which allows for viewing feeds of any user and leaking tokens

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-09 · updated 2026-06-17
Weakness: CWE-284

Description

FreshRSS is a free, self-hostable RSS aggregator. Prior 1.28.0, a bug in the auth logic related to master authentication tokens, this restriction is bypassed. Usually only the default user's feed should be viewable if anonymous viewing is enabled, and feeds of other users should be private. This vulnerability is fixed in 1.28.0.

Affected products

FreshRSS: before 1.28.0 — fixed in 1.28.0

How to fix

Upgrade to a fixed version: FreshRSS 1.28.0. Check the vendor advisory for mitigations.

References

https://github.com/FreshRSS/FreshRSS/commit/60cf5ea297a17db861e73cd65d7b7862bd6bcc24
https://github.com/FreshRSS/FreshRSS/pull/8165
https://github.com/FreshRSS/FreshRSS/releases/tag/1.28.0
https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-w743-fg6g-mhwh

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