Home/CVE/A CSV Formula Injection vulnerability in TrueConf Server v5.5.2.10813 allows a normal user to inject malicious spreadshe
CVE

CVE-2025-66834

A CSV Formula Injection vulnerability in TrueConf Server v5.5.2.10813 allows a normal user to inject malicious spreadshe

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.

HIGH · CVSS 7.3 EPSS 0.00041
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  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules5 YARA rules0
⬡

Weakness Classification

CWE-1236Improper Neutralization of Formula Elements in a CSV File
▤

Affected Products & Versions

1
trueconf serverall versions
⚠

Public Exploits & PoCs

1
pocgithub.com · README.mdgithub.com
◈

Sigma Hunt Rules

5
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighPotential Server Side Template Injection In Velocity
producthighRemote Server Service Abuse for Lateral Movement
producthighRemote Server Service Abuse
producthighSuspicious Child Process Of SQL Server
producthighSuspicious Process By Web Server Process
▣

Scoring & Timeline

7.3
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD30 Dec 2025 · 07:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://trueconf.comProduct
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