CVE-2025-55668: tomcat Session Fixation — Fix

Description

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.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-384 CWE-384

Affected Products

Vendor	Product	Versions
apache	tomcat	9.0.1 — 9.0.106
apache	tomcat	10.0.0 — 10.1.42
apache	tomcat	11.0.0 — 11.0.8
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All
apache	tomcat	All

References

Advisories & Patches

https://lists.apache.org/thread/v6bknr96rl7l1qxkl1c03v0qdvbbqs47

Other References

http://www.openwall.com/lists/oss-security/2025/08/13/3

Frequently Asked Questions

What is CVE-2025-55668? +

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. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-55668? +

CVE-2025-55668 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-55668? +

CVE-2025-55668 affects products from apache, specifically: tomcat. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-55668? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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