Summary
An arbitrary file upload vulnerability in the component /ms/file/uploadTemplate.do of MCMS v5.2.4 allows attackers to execute arbitrary code.
Impact
The application accepts file uploads without adequately restricting the file type or content. Typical impact: remote code execution if the uploaded file can be served and executed on the server.
CVE-2021-46036 has a CVSS score of 9.8 (Critical). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. No fixed version is listed yet, so configuration controls and monitoring matter more in the interim.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
Remediation advice
In the interim: Validate file type by inspecting the content, not just the extension or MIME type declared by the client. Store uploads outside the web root.
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is CVE-2021-46036? CVE-2021-46036 is a critical-severity unrestricted upload of dangerous file types vulnerability in net.mingsoft:ms-mcms (maven), affecting versions <= 5.2.4. No fixed version is listed yet. The application accepts file uploads without adequately restricting the file type or content.
- How severe is CVE-2021-46036? CVE-2021-46036 has a CVSS score of 9.8 (Critical). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of net.mingsoft:ms-mcms are affected by CVE-2021-46036? net.mingsoft:ms-mcms (maven) versions <= 5.2.4 is affected.
- Is there a fix for CVE-2021-46036? No fixed version is listed for CVE-2021-46036 yet. Monitor the advisory for updates and apply mitigations in the interim.
- Is CVE-2021-46036 exploitable, and should I be worried? Whether CVE-2021-46036 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2021-46036 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2021-46036? No fixed version is listed yet. In the interim: Validate file type by inspecting the content, not just the extension or MIME type declared by the client. Store uploads outside the web root.