CVE-2025-47221: An arbitrary file write was found in Keyfactor SignServer versions prior to 7.3.2

Q: How do I fix CVE-2025-47221?

signserver: upgrade to 7.3.1. Exact commands for each OS are on this page.

Q: Is CVE-2025-47221 being exploited?

CVE-2025-47221 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-47221 affect?

CVE-2025-47221 affects signserver. Severity is medium (CVSS 5.3). 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

Q: How urgent is CVE-2025-47221?

Priority 28/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2025-47221 is a medium-severity flaw (CVSS 5.3) affecting signserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 u

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 81%)
CISA exploited list	No
Weakness	CWE-284
Published	2025-11-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: keyfactor

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-13 21:15 UTCPublished CVE record published
2026-06-17 09:27 UTCUpdated Record last modified

keyfactor signserver UPGRADE

Affected: < 7.3.1

Fixed in: 7.3.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy signserver || rpm -q signserver || signserver --version

2. UPGRADE to 7.3.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade signserver

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade signserver

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-47221?

signserver: upgrade to 7.3.1. Exact commands for each OS are on this page.

Is CVE-2025-47221 being exploited?

CVE-2025-47221 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-47221 affect?

CVE-2025-47221 affects signserver. Severity is medium (CVSS 5.3). 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

How urgent is CVE-2025-47221?

Priority 28/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-47222 MEDIUM 6.5 UPGRADE A class name enumeration was found in Keyfactor SignServer versions prior to 7.3.2
CVE-2025-47220 MEDIUM 5.3 UPGRADE A local file enumeration was found in Keyfactor SignServer versions prior to 7.3.2 .The property VISIBLE_SIGNA
CVE-2025-26787 MEDIUM 4.7 UPGRADE An error in the SignServer container startup logic was found in Keyfactor SignServer versions prior to 7.2

References

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