CVE-2021-3030 Cross-site scripting in n/a
Reflected XSS in Cute Editor for ASP.NET allows attackers to execute arbitrary JavaScript in victim browsers via a crafted URL.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-3030?
CVE-2021-3030 is a medium-severity cross-site scripting vulnerability in n/a, published on 17 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2021-3030?
How do I fix CVE-2021-3030?
No fix has been published for CVE-2021-3030 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-3030 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-3030 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-f3hx-44cc-6fhr.