CVE-2021-42013

Apache HTTP Server Path Traversal Vulnerability

Apache HTTP ServerWeb servers

CVSS

9.8Critical

ExploitationExploited in the wildAdded to KEV 3 Nov 2021. Known ransomware useCISA KEV

Exploit odds (EPSS)>99.9%Chance of exploitation activity in the next 30 days, higher than 99.9% of CVEs. Scored 23 Oct 2026FIRST EPSS

Fixed inNone listedNo source names a fixed version. Check the vendor advisory below

Federal deadline17 Nov 2021Remediation due date for US federal agenciesCISA KEV

CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

10 May 2021Exploit code publicMetasploit
7 Oct 2021, 15:50 UTCPublishedCVE List
3 Nov 2021Added to CISA KEVCISA KEV

Public exploit code and templates 6

Exploit moduleApache 2.4.49/2.4.50 Traversal RCE 10 May 2021Metasploit
Auxiliary moduleApache 2.4.49/2.4.50 Traversal RCE scanner 10 May 2021Metasploit
Webapps exploitApache HTTP Server 2.4.50 - Path Traversal & Remote Code Execution (RCE) 13 Oct 2021Exploit-DB
Webapps exploitApache HTTP Server 2.4.50 - Remote Code Execution (RCE) (2) 25 Oct 2021Exploit-DB
Webapps exploitApache HTTP Server 2.4.50 - Remote Code Execution (RCE) (3) 11 Nov 2021Exploit-DB
Scanner templateApache 2.4.49/2.4.50 - Path Traversal and Remote Code ExecutionNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

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.

Text from CVE List

Affected versions 2