PatchTheCVEvalidator vulnerabilities
Recent CVEs affecting validator products. 1 tracked.
validator has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-01-16. Highest priority: CVE-2025-15104 (score 39/100).
- CVE-2025-15104 MEDIUM 5.3 UPGRADE Nu Html Checker (validator.nu) contains a restriction bypass that allows remote attackers to make the server p
FAQ
How do I fix validator 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 validator being exploited right now?
None of the tracked validator CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which validator CVE should I patch first?
CVE-2025-15104 currently ranks highest (39/100): Nu Html Checker (validator.nu) contains a restriction bypass that allows remote attackers to make the server p.