Tomcat 9/10/11 Session Fixation via Rewrite Valve
CVE-2025-55668 Published on August 13, 2025
Apache Tomcat: session fixation via rewrite valve
Session Fixation vulnerability in Apache Tomcat via rewrite valve.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.7, from 10.1.0-M1 through 10.1.41, from 9.0.0.M1 through 9.0.105.
Older, EOL versions may also be affected.
Users are recommended to upgrade to version 11.0.8, 10.1.42 or 9.0.106, which fix the issue.
Vulnerability Analysis
CVE-2025-55668 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
Session Fixation
Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.
Products Associated with CVE-2025-55668
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Affected Versions
Apache Software Foundation Apache Tomcat:- Version 11.0.0-M1, <= 11.0.7 is affected.
- Version 10.1.0-M1, <= 10.1.41 is affected.
- Version 9.0.0.M1, <= 9.0.105 is affected.
- Version 8 and below 9.0.0.M1 is unknown.
- Version 10.0.0-M1, <= 10.0.27 is unknown.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.