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CVE-2016-6851

Published: Dec 15, 2016Updated: May 6, 2026 Sources: CVE List NVDCWE-79
NVD MITRE
6.1CVSSMEDIUM
EPSS Score
2.6%
Top 16.4%
CISA KEV
Not in KEV
Exploits
2 Known
Remediation
No Fix Available

Description

An issue was discovered in Open-Xchange OX Guard before 2.4.2-rev5. Script code can be provided as parameter to the OX Guard guest reader web application. This allows cross-site scripting attacks against arbitrary users since no prior authentication is needed. Malicious script code can be executed within a user's context. This can lead to session hijacking or triggering unwanted actions via the web interface (sending mail, deleting data etc.) in case the user has an active session on the same domain already.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

n/an/a
ox guardopen-xchangeCommunications
open-xchangecommercialDECommunicationsaka open-xchange gmbh, ox

Attack Graph

Products CVE Techniques Tactics

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Exploitability

2 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

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MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

http://www.securityfocus.com/bid/92920
securityfocus.com
http://packetstormsecurity.com/files/138701/Open-Xchange-Guard-2.4.2-Cross-Site-Scripting.html
packetstormsecurity.com
https://www.exploit-db.com/exploits/40377/
exploit-db.com
and 1 more references View all →

Timeline

Published
Dec 15, 2016
Last Updated
May 6, 2026

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