CVE-2021-47834 Schlix CMS 2.2.6-6 - 'title' Persistent Cross-Site Scripting (Authenticated)
Authenticated attackers can inject persistent scripts into category titles, leading to code execution or account takeover when viewed by others.
- 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-2021-47834?
CVE-2021-47834 is a medium-severity cross-site scripting vulnerability in Schlix CMS, published on 16 Jan 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Schlix CMS 2.2.6-6 contains a persistent cross-site scripting vulnerability that allows authenticated users to inject malicious scripts into category titles. Attackers can create a new contact category with a script payload that will execute when the page is viewed by other users.
Weakness: CWE-79
Which versions are affected by CVE-2021-47834?
How do I fix CVE-2021-47834?
No fix has been published for CVE-2021-47834 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-2021-47834 being exploited?
There is no known exploitation of CVE-2021-47834 in the wild and no public exploit code.
Sources
Also known as GHSA-524r-9v5q-wjww.