---
id: CVE-2025-66823
title: >-
  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
summary: >-
  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 ope…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: trueconf
product: trueconf_server
affected:
  - trueconf_server = 5.5.2.10813
published: '2025-12-30'
updated: '2026-08-20'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-66823'
references:
  - url: >-
      https://github.com/x00nullbit/CVE-References/blob/main/CVE-2025-66823/README.md
    label: cve@mitre.org
  - url: 'https://trueconf.com'
    label: cve@mitre.org
  - url: >-
      https://github.com/x00nullbit/CVE-References/blob/main/CVE-2025-66823/README.md
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00193
epssPercentile: 0.0809
ingestedAt: '2026-08-20T18:59:51.579Z'
---

## Overview

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).

## Affected

- `trueconf_server = 5.5.2.10813`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.