What is CVE-2025-4979?

CVE-2025-4979 is a medium-severity vulnerability in Gitlab, classified under CWE-1220. CVSS score: 4.9/10. Published 2025-05-22.

How severe is CVE-2025-4979?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Is CVE-2025-4979 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Gitlab

CVE-2025-4979

An issue has been discovered in GitLab CE/EE affecting all versions before 17.10.7, 17.11 before 17.11.3, and 18.0 before 18.0.1. An attacker may be able to reveal masked or hidden CI variables (that they did not author) in the WebUI, by simply creating their own variable and observing the HTTP response.

EPSS: 0.004 (31.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

Affected products

Gitlab — versions 17.11, 0, 18.0.0

Weakness classification (CWE)

CWE-1220

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

cve@gitlab.com (issue-tracking, permissions-required, Broken Link)

Frequently asked questions

What is CVE-2025-4979?: CVE-2025-4979 is a medium-severity vulnerability in Gitlab, classified under CWE-1220. CVSS score: 4.9/10. Published 2025-05-22.
How severe is CVE-2025-4979?: Medium severity. CVSS v3 base score is 4.9 out of 10.
Is CVE-2025-4979 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.