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CVE-2016-6851

25
FAUCET Score

CVE-2016-6851 describes a Cross-Site Scripting (XSS) vulnerability in Open-Xchange OX Guard versions prior to 2.4.2-rev5, allowing attackers to inject malicious script code into the guest reader web application. This medium-severity vulnerability (CVSS 6.1) requires no authentication and can lead to session hijacking or unauthorized actions if a user has an active session on the same domain. While not actively exploited in the wild and lacking significant community discussion, exploit code is publicly available via ExploitDB, indicating a potential for exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.4.2CPE matchmatch criteria
cpe:2.3:a:open-xchange:ox_guard:*:rev4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.64%
Probability of exploitation in next 30 days
EPSS Percentile
84.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-40377 · Sep 13, 2016
This CVE's current EPSS score of 0.0264 is in the 93rd percentile among its peer group of 26,221 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/138701/Open-Xchange-Guard-2.4.2-Cross-Site-Scripting.html
ExploitThird Party AdvisoryVDB Entry
exploit-db.com / exploits/40377
ExploitThird Party AdvisoryVDB Entry
securityfocus.com / archive/1/539395/100/0/threaded
securityfocus.com / bid/92920
Third Party AdvisoryVDB Entry