CVE-2025-68402— FreshRSS has an authentication bypass due to truncated bcrypt hash [edge branch]
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存在授权问题漏洞，该漏洞源于密码验证逻辑缺陷，可能导致即使用户输入错误密码，验证也会成功。
Possible ATT&CK Techniques 1 AI
T1078 · Valid Accounts
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I. Basic Information for CVE-2025-68402
Vulnerability Information
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Vulnerability Title
FreshRSS has an authentication bypass due to truncated bcrypt hash [edge branch]
Source: CVE Program / CVE List V5
Vulnerability Description
FreshRSS is a free, self-hostable RSS aggregator. From 57e1a37 - 00f2f04, the lengths of the nonce was changed from 40 chars to 64. password_verify() is currently being called with a constructed string (SHA-256 nonce + part of a bcrypt hash) instead of the raw user password. Due to bcrypt’s 72-byte input truncation, this causes password verification to succeed even when the user enters an incorrect password. This vulnerability is fixed in 1.27.2-dev (476e57b). The issue was only present in the edge branch and never in a stable release.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
FreshRSS 授权问题漏洞
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存在授权问题漏洞，该漏洞源于密码验证逻辑缺陷，可能导致即使用户输入错误密码，验证也会成功。
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
II. Public POCs for CVE-2025-68402
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Patches & Fixes for CVE-2025-68402 (3)
-
Reverse hash and nonce (#8320) · FreshRSS/FreshRSS@476e57b · GitHub x_refsource_MISC
Vendor Advisories for CVE-2025-68402 (1)
IV. Related Vulnerabilities
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CVE-2025-59949
FreshRSS has Logout CSRF that Leads to DoS via <track src> -
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Same weakness: CWE-287
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V. Comments for CVE-2025-68402
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