CVE-2025-46339CWE-349

FreshRSS vulnerable to favicon cache poisoning via proxy

Medium · published June 4, 2025

CVSS v3.1
4.3
EPSS
0%
Percentile
6.6
In the wild
Unconfirmed
What it is

FreshRSS is a self-hosted RSS feed aggregator. Prior to version 1.26.2, it's possible to poison feed favicons by adding a given URL as a feed with the proxy set to an attacker-controlled one and disabled SSL verifying. The favicon hash is computed by hashing the feed URL and the salt, whilst not including the following variables: proxy address, proxy protocol, and whether SSL should be verified. Therefore it's possible to poison a favicon of a given feed by simply intercepting the response of the feed, and changing the website URL to one where a threat actor controls the feed favicon. Feed favicons can be replaced for all users by anyone. Version 1.26.2 fixes the issue.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00174 · 6.6th percentile
Weakness
CWE-349 · Acceptance of Extraneous Untrusted Data With Trusted Data
Published
2025-06-04T20:04Z
EPSS history
Timeline
  • 04 JUN 20:04Z
    FreshRSS vulnerable to favicon cache poisoning via proxy
    cvelistv5