PatchTheCVEsignserver vulnerabilities and fixes
Recent CVEs affecting signserver, with upgrade or downgrade steps. 4 tracked.
signserver has 4 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 4. Most recent: 2025-12-22. Highest priority: CVE-2025-47222 (score 34/100).
- CVE-2025-47222 MEDIUM 6.5 UPGRADE A class name enumeration was found in Keyfactor SignServer versions prior to 7.3.2
- CVE-2025-47221 MEDIUM 5.3 UPGRADE An arbitrary file write 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
FAQ
How do I fix signserver vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is signserver being exploited right now?
None of the tracked signserver CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which signserver CVE should I patch first?
CVE-2025-47222 currently ranks highest (34/100): A class name enumeration was found in Keyfactor SignServer versions prior to 7.3.2.