What is CVE-2017-8384?

CVE-2017-8384 is a medium-severity vulnerability in Craftcms Craft Cms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-05-01.

How severe is CVE-2017-8384?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Craftcms Craft Cms

CVE-2017-8384

Craft CMS before 2.6.2976 allows XSS attacks because an array returned by HttpRequestService::getSegments() and getActionSegments() need not be zero-based. NOTE: this vulnerability exists because of an incomplete fix for CVE-2017-8052.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-05-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (57.4th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Craftcms Craft Cms

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

craftcms.com/changelog (Release Notes, Vendor Advisory)
twitter.com/CraftCMS/status/857743080224473088 (Vendor Advisory)

Frequently asked questions

What is CVE-2017-8384?: CVE-2017-8384 is a medium-severity vulnerability in Craftcms Craft Cms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-05-01.
How severe is CVE-2017-8384?: Medium severity. CVSS v3 base score is 6.1 out of 10.