CVE-2025-46339

FreshRSS vulnerable to favicon cache poisoning via proxy

Description

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.

Category

4.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Affected: FreshRSS FreshRSS
Published at:
Updated at:

References

Link Tags
https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-8f79-3q3w-43c4
https://github.com/FreshRSS/FreshRSS/commit/3776e1e48f33e80eb4b674bb64b419caf3b5a4e2

Frequently Asked Questions

What is the severity of CVE-2025-46339?
CVE-2025-46339 has been scored as a medium severity vulnerability.
How to fix CVE-2025-46339?
To fix CVE-2025-46339, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-46339 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-46339 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-46339?
CVE-2025-46339 affects FreshRSS FreshRSS.
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