CVE-2021-3030CWE-79cross-site-scripting

CVE-2021-3030

Medium · published September 18, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
17.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00265 · 17.5th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-18T01:17Z
References (2)
https://github.com/athosgonzaga/CVE-2021-3030 · [email protected]https://github.com/athosgonzaga/CVE-2021-3030 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 19 SEP 03:15Z
    EPSS moved — → 0%
    epss
  • 17 SEP 00:00Z
    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
    cvelistv5