What is the CVSS score of CVE-2025-55383?

CVE-2025-55383 has a CVSS 3.1 base score of 8.6 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L. EPSS exploitation probability: 0.1%.

Which versions of Moss are affected by CVE-2025-55383?

Organizations using Moss before v0.15 face significant risk from CVE-2025-55383, a unrestricted file upload vulnerability rated CVSS 8.6.

How to fix or mitigate CVE-2025-55383?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. Review file handling controls and restrict upload directories.

Moss CVE-2025-55383

HIGH

Unrestricted Upload of File with Dangerous Type (CWE-434)

2025-08-21 cve@mitre.org

File Upload

8.6

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.6 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:08 vuln.today

CVE Published

Aug 21, 2025 - 15:15 nvd

HIGH 8.6

DescriptionCVE.org

Moss before v0.15 has a file upload vulnerability. The "upload" function configuration allows attackers to upload files of any extension to any location on the target server.

AnalysisAI

Moss before v0.15 has a file upload vulnerability. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Unrestricted File Upload (CWE-434), which allows attackers to upload malicious files that can be executed on the server. Moss before v0.15 has a file upload vulnerability. The "upload" function configuration allows attackers to upload files of any extension to any location on the target server.

Affected ProductsAI

See vendor advisory for affected versions.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate file types server-side, store uploads outside webroot, use random filenames, scan for malware.