The error page mechanism of the Java Servlet Specification requires that, when an error occurs and an error page is configured for the error that occurred, the original request and response are forwarded to the error page. This means that the request is presented to the error page with the original HTTP method. If the error page is a static file, expected behaviour is to serve content of the file as if processing a GET request, regardless of the actual HTTP method. The Default Servlet in Apache Tomcat 9.0.0.M1 to 9.0.0.M20, 8.5.0 to 8.5.14, 8.0.0.RC1 to 8.0.43 and 7.0.0 to 7.0.77 did not do this. Depending on the original request this could lead to unexpected and undesirable results for static error pages including, if the DefaultServlet is configured to permit writes, the replacement or removal of the custom error page. Notes for other user provided error pages: (1) Unless explicitly coded otherwise, JSPs ignore the HTTP method. JSPs used as error pages must must ensure that they handle any error dispatch as a GET request, regardless of the actual method. (2) By default, the response generated by a Servlet does depend on the HTTP method. Custom Servlets used as error pages must ensure that they handle any error dispatch as a GET request, regardless of the actual method.
| Software | From | Fixed in |
|---|---|---|
| apache / tomcat | 7.0.2-beta | 7.0.2-beta.x |
| apache / tomcat | 7.0.49 | 7.0.49.x |
| apache / tomcat | 7.0.12 | 7.0.12.x |
| apache / tomcat | 7.0.62 | 7.0.62.x |
| apache / tomcat | 7.0.20 | 7.0.20.x |
| apache / tomcat | 7.0.34 | 7.0.34.x |
| apache / tomcat | 7.0.58 | 7.0.58.x |
| apache / tomcat | 7.0.8 | 7.0.8.x |
| apache / tomcat | 7.0.55 | 7.0.55.x |
| apache / tomcat | 7.0.1 | 7.0.1.x |
| apache / tomcat | 7.0.2 | 7.0.2.x |
| apache / tomcat | 7.0.5 | 7.0.5.x |
| apache / tomcat | 7.0.51 | 7.0.51.x |
| apache / tomcat | 7.0.4-beta | 7.0.4-beta.x |
| apache / tomcat | 7.0.63 | 7.0.63.x |
| apache / tomcat | 7.0.22 | 7.0.22.x |
| apache / tomcat | 7.0.39 | 7.0.39.x |
| apache / tomcat | 7.0.26 | 7.0.26.x |
| apache / tomcat | 7.0.46 | 7.0.46.x |
| apache / tomcat | 7.0.72 | 7.0.72.x |
| apache / tomcat | 7.0.76 | 7.0.76.x |
| apache / tomcat | 7.0.71 | 7.0.71.x |
| apache / tomcat | 7.0.28 | 7.0.28.x |
| apache / tomcat | 7.0.59 | 7.0.59.x |
| apache / tomcat | 7.0.65 | 7.0.65.x |
| apache / tomcat | 7.0.0 | 7.0.0.x |
| apache / tomcat | 7.0.50 | 7.0.50.x |
| apache / tomcat | 7.0.6 | 7.0.6.x |
| apache / tomcat | 7.0.18 | 7.0.18.x |
| apache / tomcat | 7.0.14 | 7.0.14.x |
| apache / tomcat | 7.0.48 | 7.0.48.x |
| apache / tomcat | 7.0.11 | 7.0.11.x |
| apache / tomcat | 7.0.67 | 7.0.67.x |
| apache / tomcat | 7.0.74 | 7.0.74.x |
| apache / tomcat | 7.0.23 | 7.0.23.x |
| apache / tomcat | 7.0.66 | 7.0.66.x |
| apache / tomcat | 7.0.0-beta | 7.0.0-beta.x |
| apache / tomcat | 7.0.44 | 7.0.44.x |
| apache / tomcat | 7.0.69 | 7.0.69.x |
| apache / tomcat | 7.0.7 | 7.0.7.x |
| apache / tomcat | 7.0.42 | 7.0.42.x |
| apache / tomcat | 7.0.60 | 7.0.60.x |
| apache / tomcat | 7.0.37 | 7.0.37.x |
| apache / tomcat | 7.0.29 | 7.0.29.x |
| apache / tomcat | 7.0.45 | 7.0.45.x |
| apache / tomcat | 7.0.68 | 7.0.68.x |
| apache / tomcat | 7.0.13 | 7.0.13.x |
| apache / tomcat | 7.0.47 | 7.0.47.x |
| apache / tomcat | 7.0.5-beta | 7.0.5-beta.x |
| apache / tomcat | 7.0.41 | 7.0.41.x |
| apache / tomcat | 7.0.31 | 7.0.31.x |
| apache / tomcat | 7.0.30 | 7.0.30.x |
| apache / tomcat | 7.0.15 | 7.0.15.x |
| apache / tomcat | 7.0.19 | 7.0.19.x |
| apache / tomcat | 7.0.75 | 7.0.75.x |
| apache / tomcat | 7.0.16 | 7.0.16.x |
| apache / tomcat | 7.0.10 | 7.0.10.x |
| apache / tomcat | 7.0.36 | 7.0.36.x |
| apache / tomcat | 7.0.25 | 7.0.25.x |
| apache / tomcat | 7.0.54 | 7.0.54.x |
| apache / tomcat | 7.0.35 | 7.0.35.x |
| apache / tomcat | 7.0.61 | 7.0.61.x |
| apache / tomcat | 7.0.57 | 7.0.57.x |
| apache / tomcat | 7.0.43 | 7.0.43.x |
| apache / tomcat | 7.0.32 | 7.0.32.x |
| apache / tomcat | 7.0.38 | 7.0.38.x |
| apache / tomcat | 7.0.21 | 7.0.21.x |
| apache / tomcat | 7.0.27 | 7.0.27.x |
| apache / tomcat | 7.0.24 | 7.0.24.x |
| apache / tomcat | 7.0.17 | 7.0.17.x |
| apache / tomcat | 7.0.40 | 7.0.40.x |
| apache / tomcat | 7.0.9 | 7.0.9.x |
| apache / tomcat | 7.0.4 | 7.0.4.x |
| apache / tomcat | 7.0.3 | 7.0.3.x |
| apache / tomcat | 7.0.77 | 7.0.77.x |
| apache / tomcat | 7.0.56 | 7.0.56.x |
| apache / tomcat | 7.0.64 | 7.0.64.x |
| apache / tomcat | 7.0.70 | 7.0.70.x |
| apache / tomcat | 7.0.33 | 7.0.33.x |
| apache / tomcat | 7.0.73 | 7.0.73.x |
| apache / tomcat | 8.0.4 | 8.0.4.x |
| apache / tomcat | 8.0.10 | 8.0.10.x |
| apache / tomcat | 8.0.30 | 8.0.30.x |
| apache / tomcat | 8.0.17 | 8.0.17.x |
| apache / tomcat | 8.0.7 | 8.0.7.x |
| apache / tomcat | 8.0.26 | 8.0.26.x |
| apache / tomcat | 8.0.40 | 8.0.40.x |
| apache / tomcat | 8.0.2 | 8.0.2.x |
| apache / tomcat | 8.0.20 | 8.0.20.x |
| apache / tomcat | 8.0.31 | 8.0.31.x |
| apache / tomcat | 8.0.5 | 8.0.5.x |
| apache / tomcat | 8.0.1 | 8.0.1.x |
| apache / tomcat | 8.0.0-rc3 | 8.0.0-rc3.x |
| apache / tomcat | 8.0.19 | 8.0.19.x |
| apache / tomcat | 8.0.39 | 8.0.39.x |
| apache / tomcat | 8.0.12 | 8.0.12.x |
| apache / tomcat | 8.0.27 | 8.0.27.x |
| apache / tomcat | 8.0.15 | 8.0.15.x |
| apache / tomcat | 8.0.0-rc1 | 8.0.0-rc1.x |
| apache / tomcat | 8.0.22 | 8.0.22.x |
| apache / tomcat | 8.0.29 | 8.0.29.x |
| apache / tomcat | 8.0.42 | 8.0.42.x |
| apache / tomcat | 8.0.11 | 8.0.11.x |
| apache / tomcat | 8.0.24 | 8.0.24.x |
| apache / tomcat | 8.0.0-rc10 | 8.0.0-rc10.x |
| apache / tomcat | 8.0.36 | 8.0.36.x |
| apache / tomcat | 8.0.23 | 8.0.23.x |
| apache / tomcat | 8.0.33 | 8.0.33.x |
| apache / tomcat | 8.0.6 | 8.0.6.x |
| apache / tomcat | 8.0.21 | 8.0.21.x |
| apache / tomcat | 8.0.32 | 8.0.32.x |
| apache / tomcat | 8.0.41 | 8.0.41.x |
| apache / tomcat | 8.0.25 | 8.0.25.x |
| apache / tomcat | 8.0.18 | 8.0.18.x |
| apache / tomcat | 8.0.35 | 8.0.35.x |
| apache / tomcat | 8.0.3 | 8.0.3.x |
| apache / tomcat | 8.0.38 | 8.0.38.x |
| apache / tomcat | 8.0.13 | 8.0.13.x |
| apache / tomcat | 8.0.14 | 8.0.14.x |
| apache / tomcat | 8.0.9 | 8.0.9.x |
| apache / tomcat | 8.0.0-rc5 | 8.0.0-rc5.x |
| apache / tomcat | 8.0.43 | 8.0.43.x |
| apache / tomcat | 8.0.16 | 8.0.16.x |
| apache / tomcat | 8.0.34 | 8.0.34.x |
| apache / tomcat | 8.0.28 | 8.0.28.x |
| apache / tomcat | 8.0.37 | 8.0.37.x |
| apache / tomcat | 8.5.2 | 8.5.2.x |
| apache / tomcat | 8.5.9 | 8.5.9.x |
| apache / tomcat | 8.5.4 | 8.5.4.x |
| apache / tomcat | 8.5.0 | 8.5.0.x |
| apache / tomcat | 8.5.10 | 8.5.10.x |
| apache / tomcat | 8.5.13 | 8.5.13.x |
| apache / tomcat | 8.5.14 | 8.5.14.x |
| apache / tomcat | 8.5.5 | 8.5.5.x |
| apache / tomcat | 8.5.3 | 8.5.3.x |
| apache / tomcat | 8.5.6 | 8.5.6.x |
| apache / tomcat | 8.5.7 | 8.5.7.x |
| apache / tomcat | 8.5.8 | 8.5.8.x |
| apache / tomcat | 8.5.12 | 8.5.12.x |
| apache / tomcat | 8.5.11 | 8.5.11.x |
| apache / tomcat | 8.5.1 | 8.5.1.x |
org.apache.tomcat / tomcat
|
9.0.0.M1 | 9.0.0.M21 |
org.apache.tomcat / tomcat
|
8.5.0 | 8.5.15 |
org.apache.tomcat / tomcat
|
8.0.0 | 8.0.44 |
org.apache.tomcat / tomcat
|
7.0.0 | 7.0.78 |
| 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-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 |
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.