CVE-2025-6776
Published: 27 June 2025
Summary
CVE-2025-6776 is a medium-severity Path Traversal (CWE-22) vulnerability in Xiaoyunjie Openvpn-Cms-Flask. Its CVSS base score is 5.5 (Medium).
Operationally, ranked in the top 17.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
A critical path traversal vulnerability (CWE-22) exists in xiaoyunjie openvpn-cms-flask up to version 1.2.7 within the Upload function of app/plugins/oss/app/controller.py. The flaw stems from unsanitized handling of the image argument in the file upload component, enabling directory traversal when attacker-supplied input is processed.
An unauthenticated remote attacker can exploit the issue over the network to read or modify files outside the intended upload directory, resulting in limited impacts to confidentiality, integrity, and availability. Public exploit code has already been disclosed, although the CVSS 5.5 rating and EPSS score of 0.0160 reflect modest real-world severity.
Project maintainers released version 1.2.8 containing the fix in commit e23559b98c8ea2957f09978c29f4e512ba789eb6; administrators are advised to upgrade the affected component immediately. The EPSS score has remained flat since disclosure, indicating no material increase in observed exploitation interest.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-19424
Vulnerability details
A vulnerability classified as critical was found in xiaoyunjie openvpn-cms-flask up to 1.2.7. This vulnerability affects the function Upload of the file app/plugins/oss/app/controller.py of the component File Upload. The manipulation of the argument image leads to path traversal. The attack…
more
can be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 1.2.8 is able to address this issue. The name of the patch is e23559b98c8ea2957f09978c29f4e512ba789eb6. It is recommended to upgrade the affected component.
- 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.
Validates pathnames and filenames to prevent traversal outside intended directories.