CVE-2021-4191
Private GitLab instances with restricted sign-ups may be vulnerable to user enumeration to unauthenticated users through the GraphQL API.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 80.0%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
Description
An issue has been discovered in GitLab CE/EE affecting versions 13.0 to 14.6.5, 14.7 to 14.7.4, and 14.8 to 14.8.2. Private GitLab instances with restricted sign-ups may be vulnerable to user enumeration to unauthenticated users through the GraphQL API.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 80.00% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- gitlab/gitlab
- Source
- cve@gitlab.com
EPSS 80.0% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4191.jsonVendor Advisory
- https://gitlab.com/gitlab-org/gitlab/-/issues/343898Broken Link
- https://hackerone.com/reports/1089609Permissions Required, Third Party Advisory
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4191.jsonVendor Advisory
- https://gitlab.com/gitlab-org/gitlab/-/issues/343898Broken Link
- https://hackerone.com/reports/1089609Permissions Required, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.