GitLab CE/EE versions starting from 10.5 are susceptible to a server-side request forgery vulnerability when requests to the internal network for webhooks are enabled, even on a GitLab instance where registration is limited. The same vulnerability actually spans multiple CVEs, due to similar reports that were fixed across separate patches. These CVEs are CVE-2021-39935, CVE-2021-22214, CVE-2021-22175
View the template here CVE-2021-22214.yaml
References:
https://docs.gitlab.com/ee/api/lint.html