Vulnerability Description
Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache Tomcat. For a subset of unlikely rewrite rule configurations, it was possible for a specially crafted request to bypass some rewrite rules. If those rewrite rules effectively enforced security constraints, those constraints could be bypassed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.5, from 10.1.0-M1 through 10.1.39, from 9.0.0.M1 through 9.0.102. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version [FIXED_VERSION], which fixes the issue.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Tomcat | >= 9.0.0, < 9.0.104 |
Related Weaknesses (CWE)
References
- https://lists.apache.org/[email protected]Mailing ListVendor Advisory
- http://www.openwall.com/lists/oss-security/2025/04/28/3Mailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html
FAQ
What is CVE-2025-31651?
CVE-2025-31651 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache Tomcat. For a subset of unlikely rewrite rule configurations, it was possible for a specially crafted request to ...
How severe is CVE-2025-31651?
CVE-2025-31651 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-31651?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Tomcat.