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The CVE-2025-XXXX vulnerability in Apache Tomcat arises due to improper handling of session identifiers via the rewrite valve. Attackers can exploit this flaw by forcing a user to use a predetermined session ID, leading to session fixation. This allows unauthorized access if the victim authenticates while the malicious session remains active. The vulnerability affects Tomcat versions 11.0.0-M1 to 11.0.7, 10.1.0-M1 to 10.1.41, and 9.0.0.M1 to 9.0.105. The fix ensures session IDs are regenerated during authentication, preventing fixation.
DailyCVE Form:
Platform: Apache Tomcat
Version: 9.0.0.M1-105
Vulnerability: Session Fixation
Severity: Moderate
Date: Aug 13, 2025
Prediction: Patch by Aug 20, 2025
What Undercode Say:
grep -r "RewriteValve" /etc/tomcat/ curl -I http://localhost:8080 | grep JSESSIONID
How Exploit:
1. Attacker sets a fixed JSESSIONID.
2. Victim logs in with the forced session.
3. Attacker hijacks authenticated session.
Protection from this CVE:
- Upgrade to Tomcat 11.0.8/10.1.42/9.0.106.
- Disable rewrite valve if unused.
- Configure secure session management.
Impact:
Unauthorized session access.
Potential account compromise.
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Sources:
Reported By: github.com
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