Improper Authentication Affecting tomcat8 package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
9.89% (95th percentile)

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  • Snyk IDSNYK-UBUNTU1804-TOMCAT8-1319118
  • published22 Aug 2025
  • disclosed12 Jul 2021

Introduced: 12 Jul 2021

CVE-2021-30640  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:18.04 tomcat8.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tomcat8 package and not the tomcat8 package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

A vulnerability in the JNDI Realm of Apache Tomcat allows an attacker to authenticate using variations of a valid user name and/or to bypass some of the protection provided by the LockOut Realm. This issue affects Apache Tomcat 10.0.0-M1 to 10.0.5; 9.0.0.M1 to 9.0.45; 8.5.0 to 8.5.65.

CVSS Base Scores

version 3.1