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CVE-2025-46339— FreshRSS vulnerable to favicon cache poisoning via proxy

Quick assessment

Affected
FreshRSS FreshRSS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreshRSS是FreshRSS开源的一个免费的、可自行托管的 RSS 聚合器。 FreshRSS 1.26.2之前版本存在安全漏洞，该漏洞源于feed图标哈希计算不当，可能导致图标投毒。

CVSS 4.3 · Medium EPSS 0.17% · P6
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I. Basic Information for CVE-2025-46339

Vulnerability Information
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Vulnerability Title
FreshRSS vulnerable to favicon cache poisoning via proxy
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在可信数据中接受外来的不可信数据
Source: CVE Program / CVE List V5
Vulnerability Title
FreshRSS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreshRSS是FreshRSS开源的一个免费的、可自行托管的 RSS 聚合器。 FreshRSS 1.26.2之前版本存在安全漏洞，该漏洞源于feed图标哈希计算不当，可能导致图标投毒。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreshRSS FreshRSS < 1.26.2 -

II. Public POCs for CVE-2025-46339

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III. Intelligence Information for CVE-2025-46339

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Same Patch Batch · FreshRSS · 2025-06-04 · 6 CVEs total

CVE-2025-46341 7.1 HIGH Privilege escalation via SSRF when using HTTP auth
CVE-2025-31136 6.7 MEDIUM FreshRSS vulnerable to Cross-site Scripting by <iframe>'ing a vulnerable same-origin page
CVE-2025-32015 6.7 MEDIUM FreshRSS vulnerable to Cross-site Scripting by embedding <script> tag inside <iframe srcdo
CVE-2025-31482 4.3 MEDIUM FreshRSS vulnerable to DoS by malicious feed entry loading logout URL
CVE-2025-31134 FreshRSS vulnerable to directory enumeration via ext.php

IV. Related Vulnerabilities

Same product: FreshRSS
Same vendor: FreshRSS
Same weakness: CWE-349

V. Comments for CVE-2025-46339

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