What is CVE-2017-16907?

CVE-2017-16907 is a medium-severity vulnerability in Horde Groupware, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2017-11-20.

How severe is CVE-2017-16907?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Horde Groupware

CVE-2017-16907

In Horde Groupware 5.2.19 and 5.2.21, there is XSS via the Color field in a Create Task List action.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-11-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.7th percentile), scored 2026-10-24.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Horde Groupware — versions 5.2.19, 5.2.21

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

code610.blogspot.com/2017/11/rce-via-xss-horde-5219.html (Exploit, Third Party Advisory, Issue Tracking)
github.com/horde/base/commit/fb2113bbcd04bd4a28c46aad0889fb0a3979a230 (Patch, Third Party Advisory)
lists.debian.org/debian-lts-announce/2020/08/msg00046.html (mailing-list)
lists.debian.org/debian-lts-announce/2020/08/msg00047.html (mailing-list)

Frequently asked questions

What is CVE-2017-16907?: CVE-2017-16907 is a medium-severity vulnerability in Horde Groupware, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2017-11-20.
How severe is CVE-2017-16907?: Medium severity. CVSS v3 base score is 5.4 out of 10.