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CVE-2016-6853

25
FAUCET Score

CVE-2016-6853 is a Cross-Site Scripting (XSS) vulnerability affecting Open-Xchange OX Guard versions prior to 2.4.2-rev5. Attackers can inject malicious script code or external website references into PGP public key names, which can then be executed when the key is requested via a specific URL. This medium-severity vulnerability (CVSS 6.1) allows for session hijacking, phishing, or triggering unauthorized actions within a user's context. While not actively exploited in the wild and lacking significant community discussion or media coverage, public exploit code exists, as evidenced by an ExploitDB entry.

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
2.44%
Probability of exploitation in next 30 days
EPSS Percentile
82.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-40377 · Sep 13, 2016
This CVE's current EPSS score of 0.0244 is in the 92nd percentile among its peer group of 26,208 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