CVE-2023-26262
Published: 14 March 2023
Summary
CVE-2023-26262 is a high-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Sitecore Experience Manager. Its CVSS base score is 7.2 (High).
Operationally, ranked in the top 4.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
Sitecore XP and XM version 10.3 contain an unrestricted language file upload vulnerability that permits an authenticated user to upload files leading to code execution on the content management server. The flaw is tracked as CVE-2023-26262 and carries a CVSS score of 7.2 under CWE-434.
An authenticated Sitecore user can exploit the issue over the network without user interaction to obtain full control over the affected content management instance, resulting in impacts to confidentiality, integrity, and availability.
Public references include a proof-of-concept on GitHub and mitigation guidance on the Sitecore trust site. The EPSS score has remained near 0.18 with a recorded peak of 0.1794, and a public exploit is available.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-30086
Vulnerability details
An issue was discovered in Sitecore XP/XM 10.3. As an authenticated Sitecore user, a unrestricted language file upload vulnerability exists the can lead to direct code execution on the content management (CM) server.
- 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.