CVE-2025-31651
Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache Tomcat.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.05%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 4.05% probability · 90th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-116
- Affected
- apache/tomcat
- Source
- security@apache.org
References
- https://lists.apache.org/list.html?announce@tomcat.apache.orgMailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2025/04/28/3Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.