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.

CVSS v3 7.3 HIGH

7.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.1 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/x00nullbit/CVE-References/blob/main/CVE-2025-66834/README.md	Exploit Third Party Advisory
https://trueconf.com	Product
https://github.com/x00nullbit/CVE-References/blob/main/CVE-2025-66834/README.md	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:trueconf:trueconf_server:5.5.2.10813:*:*:*:*:windows:*:*

History

No history.

Information

Published : 2025-12-30 19:15

Updated : 2026-08-20 18:09

NVD link : CVE-2025-66834

Mitre link : CVE-2025-66834

CVE.ORG link : CVE-2025-66834

JSON object : View

Products Affected

trueconf

trueconf_server

CWE

CWE-1236

Improper Neutralization of Formula Elements in a CSV File

{"id": "CVE-2025-66834", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-66834", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-01-02T15:10:34.198999Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.3, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.1}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "n/a", "product": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}]}], "published": "2025-12-30T19:15:44.720", "references": [{"url": "https://github.com/x00nullbit/CVE-References/blob/main/CVE-2025-66834/README.md", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://trueconf.com", "tags": ["Product"], "source": "cve@mitre.org"}, {"url": "https://github.com/x00nullbit/CVE-References/blob/main/CVE-2025-66834/README.md", "tags": ["Exploit", "Third Party Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-1236"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Una vulnerabilidad de inyecci\u00f3n de f\u00f3rmulas CSV en TrueConf Server v5.5.2.10813 permite a un usuario normal inyectar f\u00f3rmulas maliciosas de hoja de c\u00e1lculo en registros de chat exportados a trav\u00e9s de un Nombre para Mostrar manipulado."}], "lastModified": "2026-08-20T18:09:37.043", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:trueconf:trueconf_server:5.5.2.10813:*:*:*:*:windows:*:*", "vulnerable": true, "matchCriteriaId": "A646E1C3-667C-4AE7-82C5-4667C6BCBA41"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}