CVE-2025-46339Public exploitNetwork attack vector

Shared favicon replacement via incomplete cache key

Published Jun 4, 2025 · Updated Jun 4, 2025

Cache poisoning in FreshRSS before 1.26.2 allows remote authenticated users to replace feed favicons for all users. The FreshRSS_Feed::hash method keys shared favicon files only on the feed URL and system salt, omitting the mutable website URL and proxy settings used to fetch the image. Any account can edit a feed website URL or intercept its response through a configured proxy, causing attacker-controlled imagery to appear across accounts.

CVSS severity4.3
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cache poisoning in FreshRSS before 1.26.2 allows remote authenticated users to replace feed favicons for all users. The FreshRSS_Feed::hash method keys shared favicon files only on the feed URL and system salt, omitting the mutable website URL and proxy settings used to fetch the image. Any account can edit a feed website URL or intercept its response through a configured proxy, causing attacker-controlled imagery to appear across accounts.

The record

CVE
CVE-2025-46339
Published
Jun 4, 2025
Updated
Jun 4, 2025
Vendor
FreshRSS
Product
FreshRSS
Classifications
CWE-349, T1491.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.26.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FreshRSS · FreshRSSversion=< 1.26.2

Published CVSS scores

4.3GitHub Maintainer Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-349Acceptance of Extraneous Untrusted Data With Trusted Data
T1491.001Internal Defacement

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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