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CVE-2017-16906

20
FAUCET Score

CVE-2017-16906 describes a Cross-Site Scripting (XSS) vulnerability found in Horde Groupware versions 5.2.19 through 5.2.22, specifically within the URL field during a "Calendar -> New Event" action. This medium-severity vulnerability (CVSS 5.4) requires user interaction and low privileges, allowing an attacker to inject malicious scripts that could lead to limited impact on confidentiality and integrity. There is currently no evidence of active exploitation, nor are there publicly available exploit modules or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.2.19, <= 5.2.22CPE matchmatch criteria
cpe:2.3:a:horde:groupware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.09%
Probability of exploitation in next 30 days
EPSS Percentile
61.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0109 is in the 94th percentile among its peer group of 15,239 CVEs.

Social Chatter

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

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

code610.blogspot.com / 2017/11/rce-via-xss-horde-5219.html
ExploitIssue TrackingThird Party Advisory
github.com / horde/kronolith/commit/09d90141292f9ec516a7a2007bf828ce2bbdf60d
PatchThird Party Advisory
github.com / starnightcyber/Miscellaneous/blob/master/Horde/README.md
ExploitThird Party Advisory
lists.debian.org / debian-lts-announce/2020/08/msg00049.html