CVE-2022-37159
Published: 25 August 2022
Summary
CVE-2022-37159 is a critical-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Claroline Claroline. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 12.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
Claroline versions 13.5.7 and earlier contain an unrestricted file upload flaw tracked as CVE-2022-37159 and CWE-434. The vulnerability permits remote code execution when an attacker supplies a crafted file that the application stores and later executes, producing a CVSS 3.1 score of 9.8 reflecting network attack vector, no required credentials, and full confidentiality, integrity, and availability impact.
An unauthenticated attacker can send a malicious file directly to the affected Claroline instance over the network and obtain arbitrary command execution on the underlying server, resulting in complete system compromise.
Public references consist of a GitHub repository containing a proof-of-concept for the file-upload vector, but no vendor advisory or patch information is supplied in the available sources.
EPSS for the CVE rose from a low baseline to a peak of 0.0853 on 2025-01-22 before receding to the current value of 0.0338, indicating measurable post-disclosure exploitation interest that later subsided.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-39812
Vulnerability details
Claroline 13.5.7 and prior is vulnerable to Remote code execution via arbitrary file upload.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Requiring identifiable owners for portable devices reduces the attack surface for unrestricted uploads of dangerous file types via anonymous media.
Dangerous file uploads can be detonated in the chamber to determine malice before any production write or execution occurs.
Prevents unrestricted writing of arbitrary or malicious firmware by keeping hardware write-protect enabled except under tightly controlled manual procedures.
Scans files from external sources on download/open/execute, blocking unrestricted uploads of dangerous file types.