CVE-2021-41866 Cross-site scripting in n/a
Attackers can inject malicious scripts via unescaped template names in the admin panel, potentially compromising administrator accounts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-41866?
CVE-2021-41866 is a medium-severity cross-site scripting vulnerability in Mybb Mybb, published on 26 Oct 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
MyBB before 1.8.28 allows stored XSS because the displayed Template Name value in the Admin CP's theme management is not escaped properly.
Weakness: CWE-79
Which versions are affected by CVE-2021-41866?
It affects 1 product.
Products include Mybb Mybb.
How do I fix CVE-2021-41866?
No fix has been published for CVE-2021-41866 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-2021-41866 being exploited?
There is no known exploitation of CVE-2021-41866 in the wild and no public exploit code.