What is CVE-2017-8778?

CVE-2017-8778 is a medium-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-05-04.

How severe is CVE-2017-8778?

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

XSS in GitLab

CVE-2017-8778

GitLab before 8.14.9, 8.15.x before 8.15.6, and 8.16.x before 8.16.5 has XSS via a SCRIPT element in an issue attachment or avatar that is an SVG document.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-05-04 · 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: 0.009 (58.7th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

GitLab — versions 8.15.0, 8.15.1, 8.15.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

about.gitlab.com/2017/02/15/gitlab-8-dot-16-dot-5-security-release/ (Patch, Release Notes, Vendor Advisory)
gitlab.com/gitlab-org/gitlab-ce/issues/27471 (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2017-8778?: CVE-2017-8778 is a medium-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-05-04.
How severe is CVE-2017-8778?: Medium severity. CVSS v3 base score is 6.1 out of 10.