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CVE-2016-6851

MediumPublished

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....

Published: Dec 15, 2016
Updated: Aug 6, 2024
Assigning CNA: mitre
Evidence observed: Sep 13, 2016

Primary CVSS

6.1/ 10Medium

nvd · CVSS 3.0

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS probability estimate

3.3%

Low · next 30 days

Percentile: 87.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

Open-Xchange Guard 2.4.2 - Multiple Cross-Site Scripting VulnerabilitiesExploit
Benjamin Daniel Mussler · linux · Sep 13, 2016

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