Overview
CVE-2025-54592 is a critical vulnerability discovered in FreshRSS versions 1.26.3 and below. FreshRSS is a popular self-hostable RSS aggregator used by many individuals and organizations to manage their RSS feeds. This vulnerability stems from a flaw in the session termination process, where the session cookie remains active and unchanged even after the user has logged out. This could potentially allow an attacker to hijack the session, leading to system compromise or data leakage.
The severity of this vulnerability is high, with a CVSS score of 9.8. The potential impact of this vulnerability, if exploited, is significant, which underscores the urgency of applying the necessary mitigation efforts.
Vulnerability Summary
CVE ID: CVE-2025-54592
Severity: Critical (9.8 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise, potential data leakage
Affected Products
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Product | Affected Versions
FreshRSS | 1.26.3 and below
How the Exploit Works
The exploit works by taking advantage of the active session cookie that remains unchanged even after a user logs out of FreshRSS. An attacker could intercept this cookie and reuse it to initiate a new session. This could lead to session hijacking and session fixation vulnerabilities.
Conceptual Example Code
The conceptual example below demonstrates how an attacker might intercept and reuse the session cookie:
GET /rss/feeds HTTP/1.1
Host: target.example.com
Cookie: session_id=unchanged_cookieIn this example, the attacker uses the `GET` method to request the `/rss/feeds` endpoint from `target.example.com`. The `Cookie` header contains the unchanged session cookie (`session_id=unchanged_cookie`) that the attacker intercepted after the user logged out.
Mitigation Guidance
To mitigate this vulnerability, users are advised to upgrade to FreshRSS version 1.27.0 or above which contains a fix for this issue. In the interim, users can also use Web Application Firewall (WAF) or Intrusion Detection System (IDS) as temporary mitigation measures. As a best practice, users are also recommended to always ensure that their systems are updated with the latest security patches and updates to avoid such vulnerabilities.
