CVE-2021-47835 Freeter 1.2.1 - Persistent Cross-Site Scripting
Attackers can inject malicious scripts via widget titles or files in Freeter, potentially leading to remote code execution when victims interact with the application.
- 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-2021-47835?
CVE-2021-47835 is a medium-severity cross-site scripting vulnerability in Freeter, 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
Freeter 1.2.1 contains a persistent cross-site scripting vulnerability that allows attackers to store malicious payloads in custom widget titles and files. Attackers can craft malicious files with embedded scripts that execute when victims interact with the application, potentially enabling remote code execution.
Weakness: CWE-79
Which versions are affected by CVE-2021-47835?
How do I fix CVE-2021-47835?
No fix has been published for CVE-2021-47835 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-2021-47835 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47835 exists.
Sources
Also known as GHSA-xfw8-xm28-h6fx.