CVE-2025-63695
Published: 18 November 2025
Summary
CVE-2025-63695 is a critical-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Dzzoffice Dzzoffice. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 33.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-10 (Information Input Validation).
Deeper analysis
CVE-2025-63695 is an arbitrary file upload vulnerability in DzzOffice versions 2.3.7 and prior, affecting the component /dzz/system/ueditor/php/controller.php. Published on 2025-11-18, it carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), marking it as critical, and maps to CWE-434 (Unrestricted Upload of File with Dangerous Type).
Unauthenticated attackers can exploit this vulnerability remotely over the network with low attack complexity and no user interaction required. Exploitation enables high-impact compromise of confidentiality, integrity, and availability, allowing attackers to upload arbitrary files, potentially leading to remote code execution or full server control.
References include GitHub repositories and issues such as https://github.com/Yohane-Mashiro/dzzoffice_upload (listed twice) and https://github.com/zyx0814/dzzoffice/issues/365, which document the vulnerability and likely include proof-of-concept demonstrations. No specific patch or mitigation details are detailed in the provided information.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-198056
Vulnerability details
DzzOffice v2.3.7 and before is vulnerable to Arbitrary File Upload in /dzz/system/ueditor/php/controller.php.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unauthenticated arbitrary file upload to web root in public-facing DzzOffice web application enables exploitation for initial access, allowing upload of malicious HTML/JS for persistent XSS.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly mitigates unrestricted arbitrary file uploads by implementing validation checks on file type, content, and format in the vulnerable PHP controller.
Enforces authentication and authorization for the file upload endpoint, blocking unauthenticated remote exploitation.
Scans and eradicates malicious code in uploaded files, such as webshells, at system entry points to limit damage from successful uploads.