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CVE-2025-31651

Apache Tomcat vulnerability

9.8 CRITICALEPSS 4.19%
  1. Published28 Apr 2025

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 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Apache Tomcat≥ 10.1.0 < 10.1.40 · ≥ 11.0.0 < 11.0.6 · ≥ 9.0.0 < 9.0.104

Remediation

Fixed in
Apache Tomcat≥ 10.1.40

References

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Frequently asked

Is CVE-2025-31651 being actively exploited?

CVE-2025-31651 is not in the CISA KEV catalog. Its EPSS exploit probability is 4.19%.

How severe is CVE-2025-31651?

CVE-2025-31651 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 4.19% probability of exploitation.

Which products are affected by CVE-2025-31651?

Affected products include Apache Tomcat.

How do I fix CVE-2025-31651?

Upgrade affected software to a fixed version, for example Apache Tomcat 10.1.40 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-31651 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.