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Vulnerabilities

Vulnerability · CVE-2025-31651

Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in Apache Tomcat.

Published Apr 28, 2025 · catalog updated Feb 26, 2026 · Apache Software Foundation Apache Tomcat

Check if you run it

No confirmed exploitation is on record for CVE-2025-31651. EPSS is 4.19%. Act only if a listed version of Apache Software Foundation Apache Tomcat is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
4.19%
Remediation
Vendor / distro source
Affected products
vendor Apache Software Foundation Apache Tomcat 11.0.0-M1 ≤11.0.5

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Apache Software Foundation Apache Tomcat 11.0.0-M1 ≤11.0.511.0.0-M1 ≤11.0.5

How to fix CVE-2025-31651

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-31651. EPSS is 4.19%. Act only if a listed version of Apache Software Foundation Apache Tomcat is installed.

Which versions are affected?

Compare what you have installed with Apache Software Foundation Apache Tomcat 11.0.0-M1 ≤11.0.5 11.0.0-M1 ≤11.0.5. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 4.19%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 28, 2025 · EUVD

    Detected

    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 1

  2. Feb 26, 2026 · EUVD

    Updated

    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 1

Sources

  • CVE.orgVulnerability recordCVE-2025-31651

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-31651

    30-day exploitation probability 4.2%

    first.org
  • EUVDVulnerability recordEUVD-2025-13626

    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 c

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.