CVE-2025-66834: High severity TrueConf TrueConf Server vulnerability
Published Dec 30, 2025
·Updated
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 Software
2 affected components
TrueConf TrueConf Server
TrueConf Trueconf Server Windows=5.5.2.10813
Event History
Dec 30, 2025
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·07:15 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2025-66834?
CVE-2025-66834 has been classified as a medium severity vulnerability due to its potential for data manipulation.
2
How do I fix CVE-2025-66834?
To mitigate CVE-2025-66834, upgrade TrueConf Server to the latest version that addresses this vulnerability.
3
Who is affected by CVE-2025-66834?
CVE-2025-66834 affects users of TrueConf Server version 5.5.2.10813.
4
What kind of attacks can be executed due to CVE-2025-66834?
CVE-2025-66834 allows attackers to execute arbitrary spreadsheet formulas through crafted Display Names in exported chat logs.
5
Is there a workaround for CVE-2025-66834?
Currently, the best workaround for CVE-2025-66834 is to prevent users from using potentially malicious Display Names.