XSS in Trueconf Server
CVE-2025-66823
An HTML Injection vulnerability in TrueConf server 5.5.2.10813 in the conference description field allows an attacker to inject arbitrary HTML in the Create/Edit conference functionality. The payload will be triggered when the victim opens the Conference Info page ([conference url]/info).
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (8.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Trueconf Server — versions 5.5.2.10813
- Trueconf Server — versions 5.5.2.10813
Weakness classification (CWE)
References
- trueconf.com (Product)
- github.com/x00nullbit/CVE-References/blob/main/CVE-2025-66823/README.md (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-66823?
- CVE-2025-66823 is a medium-severity vulnerability in Trueconf Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-12-30.
- How severe is CVE-2025-66823?
- Medium severity. CVSS v3 base score is 5.4 out of 10.