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.

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)

EPSS: 0.002 (5.5th percentile) — read the EPSS interpretation.

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.

Affected products

Trueconf Server — versions 5.5.2.10813
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@mitre.org (Product)
cve@mitre.org (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.