CVE-2021-3030

Cute Editor for ASP.NET 6.4 is vulnerable to reflected cross-site scripting caused by improper validation of the Theme GET parameter in colorpicker_more.aspx. A remote, unauthenticated attacker can craft a URL that, once opened by a victim in a browser session authenticated to a site running the vulnerable component, executes arbitrary JavaScript in the security context of that site.

  • Published Sep 17, 2026
  • CVSS 6.1 medium
  • 0.3% chance of exploitation in the next 30 days (EPSS)

CVE-2021-3030 at the National Vulnerability Database