An issue has been discovered in GitLab affecting all versions prior to 13.2.10, 13.3.7 and 13.4.2: Stored XSS in CI Job Log

published 2020-10-08 6 y ago modified 2026-09-08 2 mo ago also BIT-gitlab-2020-13340 , EUVD-2020-5600

cvss: 8.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 66.7%; EPSS 66.7% chance of exploitation in 30 days, percentile 99.2%
public exploits: 0; none known

Patch / fix

fixed in 3

bitnami gitlab 13.2.10, 13.3.7, 13.4.2
gitlab gitlab 13.2.10, 13.3.7, 13.4.2
gitlab gitlab_enterprise 13.2.10, 13.3.7, 13.4.2

Exploit prediction

66.75% chance of exploitation in the next 30 days, higher than 99.2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.7	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
NVD	3.1	8.7	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:N/I:P/A:N
OSV	3.1	8.7	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Affected packages

ecosystem	package	affected	fixed in
bitnami	gitlab	>=12.4.0, <13.2.10 >=13.3.0, <13.3.7 >=13.4.0, <13.4.2	13.2.10 13.3.7 13.4.2

Affected products

GitLab GitLab

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

GitLab rss critical rss

References

gitlab.com /gitlab-org/gitlab/-/issues/233473
broken-link, web
hackerone.com /reports/950190
permissions-required, third-party-advisory, advisory
gitlab.com /gitlab-org/cves/-/blob/master/2020/CVE-2020-13340.json
third-party-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2020-13340
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Enhance with deb and rpm package type records.

Summary