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CVE-2016-5663

22
FAUCET Score

CVE-2016-5663 describes multiple cross-site scripting (XSS) vulnerabilities in the oauth_callback.php script of Accellion Kiteworks appliances prior to version kw2016.03.00. These flaws allow remote attackers to inject arbitrary web script or HTML through the 'code', 'error', or 'error_description' parameters. The vulnerability has a CVSSv3 score of 6.1 (Medium), indicating a network-based attack with low complexity, requiring user interaction, and potentially leading to limited impact on confidentiality and integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or inclusion in CISA's KEV catalog, though it has received minimal community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= kw2016.03.00CPE matchmatch criteria
cpe:2.3:a:accellion:kiteworks_appliance:*:*:*:*:*:*:*:*

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
0.90%
Probability of exploitation in next 30 days
EPSS Percentile
55.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0090 is in the 67th percentile among its peer group of 26,219 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

kb.cert.org / vuls/id/305607
Third Party AdvisoryUS Government Resource
securityfocus.com / bid/92662