CVE-2020-13340
HighAn 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 Oct 8, 2020 · Updated Sep 8, 2026 · Also known as BIT-gitlab-2020-13340, UBUNTU-CVE-2020-13340
Key Facts
Patch immediately- CVE-2020-13340 is a high-severity vulnerability (CVSS 8.7 v3.1) affecting GitLab.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 67% probability of exploitation in the next 30 days.
- Fixed versions are available, including GitLab 13.2.10, GitLab 13.3.7, GitLab 13.3.9-1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
8.7
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
EPSS (30-day exploit likelihood)
67%
Higher than 99.2% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
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Description
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
Affected Products
6 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| GitLabGitlab | >= 12.4.0, >= >=12.4, <13.2.10 | 13.2.10 |
Patched Releases
GitLab
13.2.10, 13.3.7, 13.3.9-1, 13.4.2
Timeline
Publicly disclosed
Oct 8, 2020
Last updated
Sep 8, 2026
Weakness Type
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- advisoryhttps://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13340.json
- advisoryhttps://hackerone.com/reports/950190
- advisoryhttps://ubuntu.com/security/CVE-2020-13340
- advisoryhttps://www.cve.org/CVERecord?id=CVE-2020-13340
- articlehttps://nvd.nist.gov/vuln/detail/CVE-2020-13340
FAQ
Common Questions.
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
Affected: GitLab versions >= 12.4.0, >= >=12.4, <13.2.10. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including GitLab 13.2.10, GitLab 13.3.7, GitLab 13.3.9-1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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