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CVE-2016-5740

30
FAUCET Score

CVE-2016-5740 describes a cross-site scripting (XSS) vulnerability in Open-Xchange OX App Suite versions prior to 7.8.2-rev5. Malicious JavaScript embedded within iCal attachments in scheduling emails could be executed in the context of a user's session when the email app displayed the content. This medium-severity vulnerability (CVSS 6.1) has a low attack complexity and requires user interaction, potentially leading to session hijacking or unauthorized actions like sending emails or deleting data. While not actively exploited in the wild and not listed in CISA's KEV catalog, public exploit code exists on ExploitDB, though there is minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 7.8.2CPE matchmatch criteria
cpe:2.3:a:open-xchange:open-xchange_appsuite:*: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
4.27%
Probability of exploitation in next 30 days
EPSS Percentile
90.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-40378 · Sep 13, 2016
This CVE's current EPSS score of 0.0427 is in the 96th percentile among its peer group of 26,208 CVEs.

Social Chatter

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/138700/Open-Xchange-App-Suite-7.8.2-Cross-Site-Scripting.html
MitigationThird Party AdvisoryVDB Entry
exploit-db.com / exploits/40378
MitigationThird Party AdvisoryVDB Entry
securityfocus.com / archive/1/539394/100/0/threaded
securityfocus.com / bid/92922
Third Party AdvisoryVDB Entry