CVE-2021-22242

Description

Insufficient input sanitization in Mermaid markdown in GitLab CE/EE version 11.4 and up allows an attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted markdown

Category

8.7
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 4.11% Top 15%
Vendor Advisory gitlab.com
Affected: GitLab GitLab
Published at:
Updated at:

References

Link Tags
https://gitlab.com/gitlab-org/gitlab/-/issues/332528 broken link
https://hackerone.com/reports/1212822 third party advisory permissions required
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22242.json vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-22242?
CVE-2021-22242 has been scored as a high severity vulnerability.
How to fix CVE-2021-22242?
To fix CVE-2021-22242, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-22242 being actively exploited in the wild?
It is possible that CVE-2021-22242 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-22242?
CVE-2021-22242 affects GitLab GitLab.
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