CVE-2022-46020
Published: 20 December 2022
Summary
CVE-2022-46020 is a critical-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Wbce Wbce Cms. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 0.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
WBCE CMS version 1.5.4 contains an unrestricted file upload vulnerability (CWE-434) that permits remote code execution, described as getshell, through modification of allowed upload file types. The issue affects the content management system’s handling of file uploads and received a CVSS 3.1 base score of 9.8.
An unauthenticated attacker can exploit the flaw over the network without user interaction to upload and execute arbitrary code on the server, resulting in full confidentiality, integrity, and availability impact.
Public references consist of a GitHub technical report that details the file-type bypass technique.
The associated EPSS score is 0.8745 at both its current and peak values.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-48858
Vulnerability details
WBCE CMS v1.5.4 can implement getshell by modifying the upload file type.
- 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.