What is the CVSS score of CVE-2025-47221?

CVE-2025-47221 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Signserver are affected by CVE-2025-47221?

Organizations using Keyfactor SignServer should be aware of moderate risk from CVE-2025-47221, a improper access control vulnerability rated CVSS 5.3.

How to fix or mitigate CVE-2025-47221?

Within 30 days: Identify affected systems running Keyfactor SignServer and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Signserver CVE-2025-47221

MEDIUM

Improper Access Control (CWE-284)

2025-11-13 cve@mitre.org

Authentication Bypass Signserver

5.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

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

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:N/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:22 vuln.today

CVE Published

Nov 13, 2025 - 21:15 nvd

MEDIUM 5.3

DescriptionCVE.org

An arbitrary file write was found in Keyfactor SignServer versions prior to 7.3.2. The properties ARCHIVETODISK_FILENAME-PATTERN, ARCHIVETODISK_PATH_BASE, ARCHIVETODISK_PATH_PATTERN can be set to any path, even ones that will point to files that already exist. This vulnerability gives a user with admin access the possibility to write files in arbitrary directories in the server file system and potentially overwrite files accessible by the local user JBoss.

AnalysisAI

An arbitrary file write was found in Keyfactor SignServer versions prior to 7.3.2. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-284. An arbitrary file write was found in Keyfactor SignServer versions prior to 7.3.2. The properties ARCHIVETODISK_FILENAME-PATTERN, ARCHIVETODISK_PATH_BASE, ARCHIVETODISK_PATH_PATTERN can be set to any path, even ones that will point to files that already exist. This vulnerability gives a user with admin access the possibility to write files in arbitrary directories in the server file system and potentially overwrite files accessible by the local user JBoss. Affected products include: Keyfactor Signserver. Version information: prior to 7.3.2..

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.