Vulnerability threat dossier
It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue only affects Apache 2.4.49 and Apache 2.4.50 and not earlier versions.
VTP analyst assessment
An incomplete fix permits remote path traversal in Apache HTTP Server 2.4.49 and 2.4.50; requests can access files outside configured aliases, and CGI-enabled configurations may extend the impact. CISA KEV confirms global exploitation and known ransomware-campaign use; CVSS is 9.8 and EPSS is 0.99964.
1 record references and 2 source references passed trusted post-response validation. The current deterministic record contains 0 independent evidence groups.
The supplied description is truncated, and actual impact depends on file protections and CGI configuration.
Exploit availability is reported as none known; server exposure and first-party observation are unknown.
First-party honeypot request semantics are potentially consistent with this CVE. This is an unconfirmed candidate match, not proof of exploitation or successful execution.
Apache HTTP Server 2.4.49 or 2.4.50, especially with CGI enabled.
First-party deterministic correlation
Honeypot request semantics are strongly consistent with CVE-2021-42013. This identifies likely attack intent, not successful exploitation or execution.
Basis: deterministic technical candidate
VTP deterministic assessment
CISA KEV lists this vulnerability as known to be exploited globally.
EPSS is 1.00; this is predictive context, not exploitation evidence.
First-party honeypot request semantics are potentially consistent with this CVE. This is an unconfirmed candidate match, not proof of exploitation or successful execution.
Material change ledger
Claim provenance
0 primary sources · 0 dependent secondary reports · 0 reports with unresolved independence. Repetition remains visible without multiplying confirmation.
Event history
CISA lists global known exploitation. This is not a VTP sensor observation.
Original publications
Technical vulnerability data
Raw observations
First-party honeypot request semantics are potentially consistent with this CVE. This is an unconfirmed candidate match, not proof of exploitation or successful execution.