Vulnerability Database

328,409

Total vulnerabilities in the database

CVE-2023-42795

Incomplete Cleanup vulnerability in Apache Tomcat.When recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.80 and from 8.5.0 through 8.5.93, an error could cause Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next. Older, EOL versions may also be affected.

Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.

CVSS v3:

  • Severity: Medium
  • Score: 5.3
  • AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CWEs:

Software From Fixed in
Maven icon org.apache.tomcat / tomcat 11.0.0-M1 11.0.0-M12
Maven icon org.apache.tomcat / tomcat 10.1.0-M1 10.1.14
Maven icon org.apache.tomcat / tomcat 9.0.0-M1 9.0.81
Maven icon org.apache.tomcat / tomcat 8.5.0 8.5.94
apache / tomcat 9.0.0-milestone1 9.0.0-milestone1.x
apache / tomcat 9.0.0-milestone10 9.0.0-milestone10.x
apache / tomcat 9.0.0-milestone11 9.0.0-milestone11.x
apache / tomcat 9.0.0-milestone12 9.0.0-milestone12.x
apache / tomcat 9.0.0-milestone13 9.0.0-milestone13.x
apache / tomcat 9.0.0-milestone14 9.0.0-milestone14.x
apache / tomcat 9.0.0-milestone15 9.0.0-milestone15.x
apache / tomcat 9.0.0-milestone16 9.0.0-milestone16.x
apache / tomcat 9.0.0-milestone17 9.0.0-milestone17.x
apache / tomcat 9.0.0-milestone18 9.0.0-milestone18.x
apache / tomcat 9.0.0-milestone19 9.0.0-milestone19.x
apache / tomcat 9.0.0-milestone2 9.0.0-milestone2.x
apache / tomcat 9.0.0-milestone20 9.0.0-milestone20.x
apache / tomcat 9.0.0-milestone21 9.0.0-milestone21.x
apache / tomcat 9.0.0-milestone22 9.0.0-milestone22.x
apache / tomcat 9.0.0-milestone23 9.0.0-milestone23.x
apache / tomcat 9.0.0-milestone24 9.0.0-milestone24.x
apache / tomcat 9.0.0-milestone25 9.0.0-milestone25.x
apache / tomcat 9.0.0-milestone26 9.0.0-milestone26.x
apache / tomcat 9.0.0-milestone27 9.0.0-milestone27.x
apache / tomcat 9.0.0-milestone3 9.0.0-milestone3.x
apache / tomcat 9.0.0-milestone4 9.0.0-milestone4.x
apache / tomcat 9.0.0-milestone5 9.0.0-milestone5.x
apache / tomcat 9.0.0-milestone6 9.0.0-milestone6.x
apache / tomcat 9.0.0-milestone7 9.0.0-milestone7.x
apache / tomcat 9.0.0-milestone8 9.0.0-milestone8.x
apache / tomcat 9.0.0-milestone9 9.0.0-milestone9.x
apache / tomcat 10.1.0-milestone3 10.1.0-milestone3.x
apache / tomcat 10.1.0-milestone4 10.1.0-milestone4.x
apache / tomcat 10.1.0-milestone5 10.1.0-milestone5.x
apache / tomcat 10.1.0-milestone1 10.1.0-milestone1.x
apache / tomcat 10.1.0-milestone2 10.1.0-milestone2.x
apache / tomcat 10.1.0-milestone7 10.1.0-milestone7.x
apache / tomcat 10.1.0-milestone8 10.1.0-milestone8.x
apache / tomcat 10.1.0-milestone9 10.1.0-milestone9.x
apache / tomcat 10.1.0-milestone6 10.1.0-milestone6.x
apache / tomcat 10.1.0-milestone10 10.1.0-milestone10.x
apache / tomcat 10.1.0-milestone11 10.1.0-milestone11.x
apache / tomcat 10.1.0-milestone12 10.1.0-milestone12.x
apache / tomcat 10.1.0-milestone13 10.1.0-milestone13.x
apache / tomcat 10.1.0-milestone14 10.1.0-milestone14.x
apache / tomcat 10.1.0-milestone16 10.1.0-milestone16.x
apache / tomcat 10.1.0-milestone15 10.1.0-milestone15.x
apache / tomcat 10.1.0-milestone17 10.1.0-milestone17.x
apache / tomcat 11.0.0-milestone1 11.0.0-milestone1.x
apache / tomcat 11.0.0-milestone2 11.0.0-milestone2.x
apache / tomcat 11.0.0-milestone4 11.0.0-milestone4.x
apache / tomcat 11.0.0-milestone3 11.0.0-milestone3.x
apache / tomcat 11.0.0-milestone5 11.0.0-milestone5.x
apache / tomcat 11.0.0-milestone7 11.0.0-milestone7.x
apache / tomcat 11.0.0-milestone8 11.0.0-milestone8.x
apache / tomcat 11.0.0-milestone9 11.0.0-milestone9.x
apache / tomcat 11.0.0-milestone10 11.0.0-milestone10.x
apache / tomcat 11.0.0-milestone6 11.0.0-milestone6.x
apache / tomcat 10.1.1 10.1.14
apache / tomcat 10.1.0-milestone20 10.1.0-milestone20.x
apache / tomcat 10.1.0-milestone19 10.1.0-milestone19.x
apache / tomcat 10.1.0-milestone18 10.1.0-milestone18.x
apache / tomcat 8.5.0 8.5.94
apache / tomcat 9.0.1 9.0.81
apache / tomcat 11.0.0-milestone11 11.0.0-milestone11.x
debian / debian_linux 10.0 10.0.x
debian / debian_linux 11.0 11.0.x
debian / debian_linux 12.0 12.0.x
Maven icon org.apache.tomcat.embed / tomcat-embed-core 11.0.0-M1 11.0.0-M12
Maven icon org.apache.tomcat.embed / tomcat-embed-core 10.1.0-M1 10.1.14
Maven icon org.apache.tomcat.embed / tomcat-embed-core 9.0.0-M1 9.0.81
Maven icon org.apache.tomcat.embed / tomcat-embed-core 8.5.0 8.5.94

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.