by Kastro
Paper/Archive/CVE-2025-31651

CVE-2025-31651

Apache Software Foundation Apache Tomcat — Apache Tomcat: Bypass of rules in Rewrite Valve

EPSS 4%CVSS 9.8
critical.is priorityof 100
48
CVSS 9.8 (ADP, NVD agree)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 91.1.911 × 2018.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Apache Tomcat11.0.0-M1 – 11.0.5–CNA
Apache Tomcat10.1.0-M1 – 10.1.39–CNA
Apache Tomcat9.0.0.M1 – 9.0.102–CNA
Apache Tomcat8.5.0 – 8.5.100–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorylists.apache.org/[email protected]refopenwall.com/lists/oss-security/2025/04/28/3reflists.debian.org/debian-lts-announce/2025/07/msg00009.html