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CVE-2025-31651

Apache Tomcat: Bypass of rules in Rewrite Valve

Published: Apr 28, 2025Updated: Nov 3, 2025 Sources: CVE List NVD GHSA BDUCWE-116
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
4.2%
Top 10.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-116

Affected Products

Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Альт 8 СПАО «ИВК»
On-premOS
Operating Systems / linux-distro
РОСА ХРОМАО «НТЦ ИТ РОСА»
On-prem
Operating Systems / linux-distro
АЛЬТ СП 10АО «ИВК»
On-premOS
Operating Systems / linux-distro
red hat inc.commercialUSOperating Systemsaka red hat
ооо «ред софт»commercialRUOperating Systemsaka red soft
ао «ивк»commercialRUOperating Systemsaka ivk
ао «нтц ит роса»commercialRUOperating Systems
and 7 more affected products View all →

Exploitability

Official Patch Available

References

https://lists.apache.org/list.html?announce@tomcat.apache.org
lists.apache.org
https://lists.apache.org/thread/sxzchc0mkp7kd238dzothwqh2cww6l7b
lists.apache.org
https://www.openwall.com/lists/oss-security/2025/04/28/3
openwall.com
and 18 more references View all →

Timeline

Published
Apr 28, 2025
Last Updated
Nov 3, 2025

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