#VU107995 Input validation error in Apache Tomcat - CVE-2025-31651
Vulnerability identifier: #VU107995
Vulnerability risk: Medium
CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/U:Green]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: Yes
Vulnerable software:
Apache Tomcat
Server applications /
Web servers
Vendor: Apache Foundation
Description
The vulnerability allows a remote attacker to bypass rewrite rules.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send a specially crafted input to the application and bypass configured rewrite rules.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Apache Tomcat: 9.0.0, 9.0.0-M1, 9.0.0-M2, 9.0.0-M3, 9.0.0-M4, 9.0.0-M5, 9.0.0-M6, 9.0.0-M7, 9.0.0-M8, 9.0.0-M9, 9.0.0-M10, 9.0.0-M11, 9.0.0-M12, 9.0.0-M13, 9.0.0-M14, 9.0.0-M15, 9.0.0-M16, 9.0.0-M17, 9.0.0-M18, 9.0.0-M19, 9.0.0-M20, 9.0.0-M21, 9.0.0-M22, 9.0.0-M23, 9.0.0-M24, 9.0.0-M25, 9.0.0-M26, 9.0.0-M27, 9.0.1, 9.0.2, 9.0.3, 9.0.4, 9.0.5, 9.0.6, 9.0.7, 9.0.8, 9.0.9, 9.0.10, 9.0.11, 9.0.12, 9.0.13, 9.0.14, 9.0.15, 9.0.16, 9.0.17, 9.0.18, 9.0.19, 9.0.20, 9.0.21, 9.0.22, 9.0.23, 9.0.24, 9.0.25, 9.0.26, 9.0.27, 9.0.28, 9.0.29, 9.0.30, 9.0.31, 9.0.32, 9.0.33, 9.0.34, 9.0.35, 9.0.36, 9.0.37, 9.0.38, 9.0.39, 9.0.40, 9.0.41, 9.0.42, 9.0.43, 9.0.44, 9.0.45, 9.0.46, 9.0.47, 9.0.48, 9.0.49, 9.0.50, 9.0.51, 9.0.52, 9.0.53, 9.0.54, 9.0.55, 9.0.56, 9.0.57, 9.0.58, 9.0.59, 9.0.60, 9.0.61, 9.0.62, 9.0.63, 9.0.64, 9.0.65, 9.0.66, 9.0.67, 9.0.68, 9.0.69, 9.0.70, 9.0.71, 9.0.72, 9.0.73, 9.0.74, 9.0.75, 9.0.76, 9.0.77, 9.0.78, 9.0.79, 9.0.80, 9.0.81, 9.0.82, 9.0.83, 9.0.84, 9.0.85, 9.0.86, 9.0.87, 9.0.88, 9.0.89, 9.0.90, 9.0.91, 9.0.92, 9.0.93, 9.0.94, 9.0.95, 9.0.96, 9.0.97, 9.0.98, 9.0.99, 9.0.100, 9.0.101, 9.0.102, 10.0.0, 10.0.0-M1, 10.0.0-M2, 10.0.0-M3, 10.0.0-M4, 10.0.0-M5, 10.0.0-M6, 10.0.0-M7, 10.0.0-M8, 10.0.0-M9, 10.0.0-M10, 10.0.0.0-M1, 10.0.1, 10.0.2, 10.0.3, 10.0.4, 10.0.5, 10.0.6, 10.0.7, 10.0.8, 10.0.9, 10.0.10, 10.0.11, 10.0.12, 10.0.13, 10.0.14, 10.0.15, 10.0.16, 10.0.17, 10.0.18, 10.0.19, 10.0.20, 10.0.21, 10.0.22, 10.0.23, 10.0.24, 10.0.25, 10.0.26, 10.0.27, 10.1.0, 10.1.0-M1, 10.1.0-M2, 10.1.0-M3, 10.1.0-M4, 10.1.0-M5, 10.1.0-M6, 10.1.0-M7, 10.1.0-M8, 10.1.0-M9, 10.1.0-M10, 10.1.0-M11, 10.1.0-M12, 10.1.0-M13, 10.1.0-M14, 10.1.0-M15, 10.1.0-M16, 10.1.0-M17, 10.1.0-M18, 10.1.0-M19, 10.1.0-M20, 10.1.1, 10.1.2, 10.1.3, 10.1.4, 10.1.5, 10.1.6, 10.1.7, 10.1.8, 10.1.9, 10.1.10, 10.1.11, 10.1.12, 10.1.13, 10.1.14, 10.1.15, 10.1.16, 10.1.17, 10.1.18, 10.1.19, 10.1.20, 10.1.21, 10.1.22, 10.1.23, 10.1.24, 10.1.25, 10.1.26, 10.1.27, 10.1.28, 10.1.29, 10.1.30, 10.1.31, 10.1.32, 10.1.33, 10.1.34, 10.1.35, 10.1.36, 10.1.37, 10.1.38, 10.1.39, 11.0.0, 11.0.0-M1, 11.0.0-M2, 11.0.0-M3, 11.0.0-M4, 11.0.0-M5, 11.0.0-M6, 11.0.0-M7, 11.0.0-M8, 11.0.0-M9, 11.0.0-M10, 11.0.0-M11, 11.0.0-M12, 11.0.0-M13, 11.0.0-M14, 11.0.0-M15, 11.0.0-M16, 11.0.0-M17, 11.0.0-M18, 11.0.0-M19, 11.0.0-M20, 11.0.0-M21, 11.0.0-M22, 11.0.0-M23, 11.0.0-M24, 11.0.0-M25, 11.0.0-M26, 11.0.1, 11.0.2, 11.0.3, 11.0.4, 11.0.5
External links
https://lists.apache.org/thread/x7l5ldwkson33bf4b3s3738lwjql618z
https://tomcat.apache.org/security-11.html#Fixed_in_Apache_Tomcat_11.0.6
https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.1.40
https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.104
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
