CVE-2025-66834

HIGH
Published Dec 30, 2025 Modified Jan 7, 2026 CWE-1236

Description

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.

Is your site exposed to CVE-2025-66834?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.3
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Weakness Type (CWE)

CWE-1236 CWE-1236

Affected Products

Vendor Product
trueconf server

References

Other References

https://trueconf.com

Frequently Asked Questions

What is CVE-2025-66834? +
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. It has a CVSS v3.1 base score of 7.3 (HIGH).
How severe is CVE-2025-66834? +
CVE-2025-66834 has a CVSS v3.1 score of 7.3 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2025-66834? +
CVE-2025-66834 affects products from trueconf, specifically: server. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-66834? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-56652

Dool in versions up to 1.3.8 is vulnerable to a CSV injection vulnerability when exporting data to a CSV file, …
CVE-2024-9102

phpLDAPadmin since at least version 1.2.0 through the latest version 1.2.6.7 allows users to export elements from the LDAP directory …
CVE-2026-14846

In version 8.2.1 of PrestaShop, there is a vulnerability relating to the incorrect sanitisation of elements, caused by inadequate validation …
CVE-2025-1421

Data provided in a request performed to the server while activating a new device are put in a database. Other …
CVE-2024-47485 9.8

There is a CSV injection vulnerability in some HikCentral Master Lite versions. If exploited, an attacker could build malicious data …
CVE-2024-55532 9.8

Improper Neutralization of Formula Elements in Export CSV feature of Apache Ranger in Apache Ranger Version < 2.6.0. Users are …

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2025-66834 — free, no signup required.