CVE-2026-36521 Cross-site scripting in n/a
An XSS vulnerability in PublicCMS site configuration allows attackers to inject scripts, potentially leading to code execution or account takeover.
- 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-2026-36521?
CVE-2026-36521 is a medium-severity cross-site scripting vulnerability in n/a, published on 15 Jun 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
PublicCMS V5.202506.d has a Cross Site Scripting (XSS) vulnerability in the site configuration management module.
Weakness: CWE-79
Which versions are affected by CVE-2026-36521?
How do I fix CVE-2026-36521?
No fix has been published for CVE-2026-36521 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-2026-36521 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-36521 exists.
Sources
Also known as GHSA-rgj4-4278-rc2j.