What’s Vulnerable › Vulnerabilities

CVE-2020-13321

• Severity: high (CVSS 8.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-09-30 · updated 2026-06-17

Description

A vulnerability was discovered in GitLab versions prior to 13.1. Username format restrictions could be bypassed allowing for html tags to be added.

Affected products

• GitLab: before 12.10.13; from 13.0.0 before 13.0.8; from 13.1.0 before 13.1.2 — fixed in 12.10.13, 13.0.8, 13.1.2

How to fix

Upgrade to a fixed version: GitLab 12.10.13, 13.0.8, 13.1.2. Check the vendor advisory for mitigations.

References

• https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13321.json
• https://gitlab.com/gitlab-org/gitlab/-/issues/25751
• https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13321.json
• https://gitlab.com/gitlab-org/gitlab/-/issues/25751

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