What is CVE-2020-13283?

CVE-2020-13283 is a high-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2020-08-13.

How severe is CVE-2020-13283?

High severity. CVSS v3 base score is 7.3 out of 10.

XSS in GitLab

CVE-2020-13283

For GitLab before 13.0.12, 13.1.6, 13.2.3 a cross-site scripting vulnerability exists in the issues list via milestone title.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-08-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.6th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% 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

GitLab — versions >=10.8

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

gitlab.com/gitlab-org/gitlab/-/issues/218448 (Broken Link)
hackerone.com/reports/877065 (Permissions Required, Third Party Advisory)
gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13283.json (Third Party Advisory)

Frequently asked questions

What is CVE-2020-13283?: CVE-2020-13283 is a high-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2020-08-13.
How severe is CVE-2020-13283?: High severity. CVSS v3 base score is 7.3 out of 10.