CVE-2025-66834 Code injection in n/a
A normal user can inject malicious spreadsheet formulas into exported chat logs via crafted Display Name, potentially leading to code execution when logs are opened.
- 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-2025-66834?
CVE-2025-66834 is a high-severity code injection vulnerability in n/a, published on 30 Dec 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A CSV Formula Injection vulnerability in TrueConf Server v5.5.2.10813 allows a normal user to inject malicious spreadsheet formulas into exported chat logs via crafted Display Name.
Weakness: CWE-1236
Which versions are affected by CVE-2025-66834?
It affects 1 product.
Products include Trueconf Trueconf Server.
How do I fix CVE-2025-66834?
No fix has been published for CVE-2025-66834 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2025-66834 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-66834 exists.
Other vulnerabilities in n/a
Sources
Also known as GHSA-5vw2-j3g7-v489.