CVE-2023-33404
Published: 26 June 2023
Summary
CVE-2023-33404 is a critical-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Blogengine Blogengine.Net. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 0.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
BlogEngine.Net versions 3.3.8.0 and earlier are affected by an unrestricted file upload vulnerability tracked as CVE-2023-33404. The flaw arises from insufficient validation in the UploadControlled.cs file and is classified under CWE-434, resulting in a CVSS 3.1 score of 9.8 that reflects network-accessible attack conditions with no required privileges or user interaction.
Remote attackers can exploit the weakness to upload malicious files and achieve remote code execution on the affected server. The EPSS score is currently 0.8201 with an identical recorded peak, indicating sustained exploitation interest since disclosure.
The listed references consist of GitHub repositories that do not contain official patch or mitigation guidance.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-37567
Vulnerability details
An Unrestricted Upload vulnerability, due to insufficient validation on UploadControlled.cs file, in BlogEngine.Net version 3.3.8.0 and earlier allows remote attackers to execute remote code.
- 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.