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CVE-2025-46339

FreshRSS vulnerable to favicon cache poisoning via proxy

Published: Jun 4, 2025Updated: Aug 12, 2025 Sources: CVE List NVDCWE-349
4.3MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 95.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-349

Affected Products

FreshRSSFreshRSS
On-prem
Consumer Software / productivity
freshrssfreshrss
On-prem
Consumer Software / productivity
freshrssoss-projectConsumer Softwareaka freshrss

Exploitability

Official Patch Available

References

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

Timeline

Published
Jun 4, 2025
Last Updated
Aug 12, 2025

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