Vulnerability Description
A stored Cross-Site Scripting vulnerability in the GitLab Flavored Markdown in GitLab CE/EE version 8.4 and above allowed an attacker to execute arbitrary JavaScript code on the victim's behalf.
CVSS Score
7.3
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gitlab | Gitlab | >= 8.4.0, < 14.1.7 |
Related Weaknesses (CWE)
References
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39887.jsonVendor Advisory
- https://gitlab.com/gitlab-org/gitlab/-/issues/332903Broken Link
- https://hackerone.com/reports/1218174Permissions RequiredThird Party Advisory
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39887.jsonVendor Advisory
- https://gitlab.com/gitlab-org/gitlab/-/issues/332903Broken Link
- https://hackerone.com/reports/1218174Permissions RequiredThird Party Advisory
FAQ
What is CVE-2021-39887?
CVE-2021-39887 is a vulnerability with a CVSS score of 7.3 (HIGH). A stored Cross-Site Scripting vulnerability in the GitLab Flavored Markdown in GitLab CE/EE version 8.4 and above allowed an attacker to execute arbitrary JavaScript code on the victim's behalf.
How severe is CVE-2021-39887?
CVE-2021-39887 has been rated HIGH with a CVSS base score of 7.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-39887?
Check the references section above for vendor advisories and patch information. Affected products include: Gitlab Gitlab.