CVE-2021-42013
Apache HTTP Server Path Traversal Vulnerability
MITRE ATT&CK techniques
How this vulnerability maps to adversary behaviour, from the Center for Threat-Informed Defense's public CVE→ATT&CK mappings. Use it to check whether your detections already cover the technique.
Summary
Apache HTTP Server contains a path traversal vulnerability that allows an attacker to perform remote code execution if files outside directories configured by Alias-like directives are not under default require all denied or if CGI scripts are enabled. This CVE ID resolves an incomplete patch for CVE-2021-41773.
Affected software
Vendor: Apache · Product: HTTP Server
Weakness types (CWE):
What to do
This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.
Related vulnerabilities in Apache
| CVE | Name | EPSS | Exploited |
|---|---|---|---|
| CVE-2021-44228 | Apache Log4j2 Remote Code Execution Vulnerability | 100.0% | Yes |
| CVE-2021-40438 | Apache HTTP Server-Side Request Forgery (SSRF) | 100.0% | Yes |
| CVE-2017-5638 | Apache Struts Remote Code Execution Vulnerability | 100.0% | Yes |
| CVE-2013-2251 | Apache Struts Improper Input Validation Vulnerability | 100.0% | Yes |
| CVE-2021-41773 | Apache HTTP Server Path Traversal Vulnerability | 100.0% | Yes |
| CVE-2018-11776 | Apache Struts Remote Code Execution Vulnerability | 100.0% | Yes |
| CVE-2017-12617 | Apache Tomcat Remote Code Execution Vulnerability | 100.0% | Yes |
| CVE-2024-45195 | Apache OFBiz Forced Browsing Vulnerability | 100.0% | Yes |
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