No exploitation reportedFix available

CVE-2020-13340

Q: Is CVE-2020-13340 actively exploited?

Active exploitation of CVE-2020-13340 has not been confirmed. Its EPSS score was 66.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2020-13340?

CVE-2020-13340 has a CVSS v3 base score of 8.7 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.

No exploitation reported by the sources we read.

Published2020-10-08
Fixed in13.4.2 · 13.3.7 · 13.2.10
WeaknessCWE-79

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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

Timeline

dates in UTC

2020-10-0814:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-13340?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-13340?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

GitLab

Branch	Affected	Fixed in	Source
13.4	≥ 13.4.0, < 13.4.2	13.4.2	NVD
13.3	≥ 13.3.0, < 13.3.7	13.3.7	NVD
13.2	< 13.2.10	13.2.10	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update GitLab to 13.4.2 · 13.3.7 · 13.2.10

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.18.7read 2026-10-23
NVDCVSS 3.18.7read 2026-10-23
NVDCVSS 2.03.5read 2026-10-23
NVDweakness (CWE)CWE-79read 2026-10-23
FIRST EPSSEPSS score66.7 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Published: 2020-10-08
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-13340?

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

Is CVE-2020-13340 actively exploited?

Active exploitation of CVE-2020-13340 has not been confirmed. Its EPSS score was 66.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-13340?

CVE-2020-13340 has a CVSS v3 base score of 8.7 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.

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