CVE-2016-6851: open-xchange ox_guard Cross-site Scripting
Vulnerability summary
CVE-2016-6851 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in open-xchange ox_guard. EPSS estimates a 2.64% chance of exploitation in the next 30 days, higher than 85.3% of scored vulnerabilities. 2 public exploits are recorded.
Timeline
- 15-12-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
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 metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
2.64%
Chance of exploitation in the next 30 days
Percentile
85%
Versus all other CVEs
30-day change
0.00 pp
From 2.64% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundExploit Reference (packetstormsecurity.com)
Maturity: unknown
Open-Xchange Guard 2.4.2 - Multiple Cross-Site Scripting Vulnerabilities
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Open-xchange1 product
- ox_guard≤ 2.4.2
1 vendor · 1 product
References
4 links- packetstormsecurity.com/files/138701/Open-Xchange-Guard-2.4.2-Cross-Site-Scripting.htmlX Refsource CONFIRMExploitThird Party AdvisoryVDB Entry