An issue has been discovered in GitLab CE/EE affecting all versions starting from 15.1 prior to 15.11.10, all versions from 16.0 prior to 16.0.6, all versions from 16.1 prior to 16.1.1. A maintainer could modify a webhook URL to leak masked webhook secrets by manipulating other masked portions. This addresses an incomplete fix for CVE-2023-0838.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-2620
• https://hackerone.com/reports/1976206
• https://gitlab.com/gitlab-org/gitlab/-/issues/410433