CVE-2021-34821 Cross-site scripting in n/a
Remote unauthenticated attackers can execute arbitrary scripts via XSS in the WebUI's 404 error handling by sending malicious requests to non-existing URIs.
- 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-2021-34821?
CVE-2021-34821 is a medium-severity cross-site scripting vulnerability in n/a, published on 19 Jul 2021. 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
Cross Site Scripting (XSS) vulnerability exists in AAT Novus Management System through 1.51.2. The WebUI has wrong HTTP 404 error handling implemented. A remote, unauthenticated attacker may be able to exploit the issue by sending malicious HTTP requests to non-existing URIs. The value of the URL path filename is copied into the HTML document as plain text tags.
Weakness: CWE-79
Which versions are affected by CVE-2021-34821?
It affects 1 product.
Products include Aat Novus Management System.
How do I fix CVE-2021-34821?
No fix has been published for CVE-2021-34821 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-2021-34821 being exploited?
There is no known exploitation of CVE-2021-34821 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-c893-g5w3-m4cj.