TI-2025-41059 Aliases CVE-2025-66834 GHSA-5vw2-j3g7-v489

A CSV Formula Injection vulnerability in TrueConf Server v5.5.2.10813 allows a normal…

HIGH 67CWE-1236Published 2025-12-30 · Updated 2026-01-02

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00312 24th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:trueconf:trueconf_server:5.5.2.10813:::::windows::	5.5.2.10813	Vulnerable	TrueConf

cpe:2.3:a:trueconf:trueconf_server:5.5.2.10813:*:*:*:*:windows:*:* Versions 5.5.2.10813 Vulnerable ·TrueConf

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-66834
2026-10-03 Alias added: GHSA-5vw2-j3g7-v489

References

Exploit 1

https://github.com/x00nullbit/CVE-References/blob/main/CVE-2025-66834/README.md

Other 1

https://trueconf.com

TI-2026-50790 Code injection in TrueConf Server KEVCVSS 4.0CRITICAL 9.5
TI-2026-50789 Missing authentication in TrueConf Server KEVCVSS 4.0CRITICAL 9.3
TI-2025-41058 A Stored Cross-Site Scripting (XSS) vulnerability exists in the Meeting location field of… CVSS 3.1HIGH 8.7
TI-2025-41057 An HTML Injection vulnerability in TrueConf server 5.5.2.10813 in the conference… CVSS 3.1MEDIUM 5.4
TI-2017-14186 TrueConf Server cross-site request forgery CVSS 3.1HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences