CVE-2022-23906
Published: 28 February 2022
Summary
CVE-2022-23906 is a high-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Cmsmadesimple Cms Made Simple. Its CVSS base score is 7.2 (High).
Operationally, ranked in the top 8.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CMS Made Simple version 2.2.15 contains a remote command execution vulnerability in its avatar upload function, tracked as CVE-2022-23906 and assigned CWE-434. The flaw allows an attacker to supply a crafted image file that bypasses type restrictions and leads to arbitrary command execution on the server. The issue carries a CVSS 3.1 base score of 7.2, reflecting network attack vector, low complexity, and high impact on confidentiality, integrity, and availability when successfully exploited.
An authenticated administrator or other high-privileged user can trigger the flaw by uploading the malicious image through the normal avatar interface. Because the vulnerability requires high privileges and no user interaction, the attacker must already possess an account with avatar-upload rights; once the crafted file is processed, the server executes attacker-controlled commands.
The sole reference points to the project’s public bug tracker entry 12502, which documents the issue but supplies no further mitigation details in the available data. The associated EPSS score has remained flat at 0.0643 with no material increase since disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-28828
Vulnerability details
CMS Made Simple v2.2.15 was discovered to contain a Remote Command Execution (RCE) vulnerability via the upload avatar function. This vulnerability is exploited via a crafted image file.
- 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.