Apache Tomcat Improper Encoding or Escaping of Output Vulnerability - CVE-2025-31651

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.