CVE-2020-13321: Input Validation
Published Sep 29, 2020
·Updated
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 Software
3 affected components
GitLab GitLab<12.10.13
GitLab GitLab>=13.0.0<13.0.8
GitLab GitLab>=13.1.0<13.1.2
Event History
Sep 29, 2020
CVE Published
via MITRE·06:40 PM
Data Sourced
via MITRE·06:40 PM
DescriptionSeverityWeakness
Frequently Asked Questions
1
What is the severity of CVE-2020-13321?
CVE-2020-13321 has a medium severity, primarily due to the potential for cross-site scripting attacks through user-inputted HTML tags.
2
How do I fix CVE-2020-13321?
To fix CVE-2020-13321, upgrade your GitLab instance to version 13.1 or later.
3
What versions are affected by CVE-2020-13321?
CVE-2020-13321 affects GitLab versions prior to 13.1, specifically versions 12.10.13, 13.0.8 to 13.0.0, and 13.1.2 to 13.1.0.
4
What kind of attack can exploit CVE-2020-13321?
CVE-2020-13321 can be exploited to perform cross-site scripting (XSS) attacks through the addition of HTML tags in usernames.
5
Is CVE-2020-13321 specific to any GitLab installation?
Yes, CVE-2020-13321 specifically affects self-managed GitLab installations and may not apply to GitLab.com.