MEDIUM

CVE-2020-13262

Gitlab GitLab 2020-06-19 CVSS v3.1

CVSS

6.1

Description

Client-Side code injection through Mermaid markup in GitLab CE/EE 12.9 and later through 13.0.1 allows a specially crafted Mermaid payload to PUT requests on behalf of other users via clicking on a link

Summary dbcve.org

GitLab CE/EE versions 12.9 through 13.0.1 are vulnerable to client-side code injection via Mermaid markup. Attackers can craft malicious Mermaid diagram definitions that, when rendered and clicked by a victim, trigger unauthorized PUT requests on behalf of that user. This is a CSRF-like attack leveraging the Mermaid diagram rendering component.

Mitigation

Upgrade GitLab to version 13.0.2 or later. As a workaround, disable Mermaid diagram rendering in affected repositories until the upgrade can be applied.

Weakness (CWE)

CWE-74 Injection

EPSS Score

0.87%

Probability of exploitation in next 30 days

57.3th percentile

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13262.json Vendor Advisory https://gitlab.com/gitlab-org/gitlab/-/issues/211949 Broken Link https://hackerone.com/reports/824689 Permissions Required

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Base CVE data derived from NVD (public domain). Enrichment by dbcve.org (CC-BY-4.0). Fetched via API.

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