---
id: CVE-2025-66834
title: >-
  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.
summary: >-
  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.
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-1236
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-2025-66834'
references:
  - url: >-
      https://github.com/x00nullbit/CVE-References/blob/main/CVE-2025-66834/README.md
    label: cve@mitre.org
  - url: 'https://trueconf.com'
    label: cve@mitre.org
  - url: >-
      https://github.com/x00nullbit/CVE-References/blob/main/CVE-2025-66834/README.md
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00312
epssPercentile: 0.21443
ingestedAt: '2026-08-20T18:59:51.541Z'
---

## Overview

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.

## Affected

- `trueconf_server = 5.5.2.10813`

## Remediation

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