CVE-2021-39906

HIGH severity · CVSS 8.7 · Cross-site scripting (XSS)

8.7CVSS HIGH

Summary

Improper validation of ipynb files in GitLab CE/EE version 13.5 and above allows an attacker to execute arbitrary JavaScript code on the victim's behalf.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredLow

User interactionRequired

Confidentiality impactHigh

Integrity impactHigh

Availability impactNone

Exploit probability (EPSS)1%

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Affected products we track (1)

GitLab

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Additional information

NVD record
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39906.jsonAdvisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39906.jsonAdvisory
https://gitlab.com/gitlab-org/gitlab/-/issues/341566
https://hackerone.com/reports/1347600Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/341566
https://hackerone.com/reports/1347600Advisory