Is CVE-2025-66823 actively exploited?

CVE-2025-66823 has no public evidence of in-the-wild exploitation as of 2026-01-07.

What is the CVSS score for CVE-2025-66823?

CVE-2025-66823 has a CVSS score of 5.4 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

How do I patch CVE-2025-66823?

Patch guidance is available from trueconf security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-66823.

CVE-2025-66823 - remediation guidance & executive summary

Description

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).

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: low
User Action: required
Scope: changed
Confidentiality: low
Integrity: low
Availability: none
Weaknesses: CWE-79 · Cross-site Scripting (XSS)

Metadata

Primary Vendor: TRUECONF
Published: 12/30/2025
Last Modified: 1/7/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2025-66823

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary