Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

published 2024-03-28 2 y ago modified 2026-09-10 1 mo ago also BIT-gitlab-2023-6371 , EUVD-2023-58612

cvss: 8.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits: 0; none known

An issue has been discovered in GitLab CE/EE affecting all versions before 16.8.5, all versions starting from 16.9 before 16.9.3, all versions starting from 16.10 before 16.10.1. A wiki page with a crafted payload may lead to a Stored XSS, allowing attackers to perform arbitrary actions on behalf of victims.

Patch / fix

fixed in 2

bitnami gitlab 16.8.5, 16.9.3, 16.10.1
GitLab GitLab 16.8.5, 16.9.3, 16.10.1

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-09-17)

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

hackerone.com https://hackerone.com/reports/2257080 referenced PoC, tagged "exploit" by a source, unverified
gitlab.com https://gitlab.com/gitlab-org/gitlab/-/issues/433021 referenced PoC, tagged "exploit" by a source, unverified

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	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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	<16.8.5 >=16.9.0, <16.9.3 >=16.10.0, <16.10.1	16.8.5 16.9.3 16.10.1

Affected products

GitLab GitLab

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

GitLab rss critical rss

References

hackerone.com /reports/2257080
technical-description, exploit, issue-tracking, evidence
gitlab.com /gitlab-org/gitlab/-/issues/433021
issue-tracking, permissions-required, exploit, evidence
nvd.nist.gov /vuln/detail/CVE-2023-6371
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: Added CPE configurations because not yet analyzed by NVD.

Summary