How severe is CVE-2025-4979?

CVE-2025-4979 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-4979 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-4979?

CVE-2025-4979 primarily affects Gitlab. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-4979?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-4979 have an EU (EUVD) identifier?

Yes. CVE-2025-4979 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16137.

When was CVE-2025-4979 published?

CVE-2025-4979 was published on 2025-05-22 and last updated on 2026-06-17.

CVE-2025-4979

CVE-2025-4979 is a medium-severity vulnerability in Gitlab with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1220.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-16137
Weakness: CWE-1220
Affected product: Gitlab
Published: 2025-05-22
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-4979?: CVE-2025-4979 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-4979 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-4979?: CVE-2025-4979 primarily affects Gitlab. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-4979?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-4979 have an EU (EUVD) identifier?: Yes. CVE-2025-4979 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16137.
When was CVE-2025-4979 published?: CVE-2025-4979 was published on 2025-05-22 and last updated on 2026-06-17.

References

https://gitlab.com/gitlab-org/gitlab/-/issues/524455

Affected products (4)

cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
cpe:2.3:a:gitlab:gitlab:18.0.0:*:*:*:community:*:*:*
cpe:2.3:a:gitlab:gitlab:18.0.0:*:*:*:enterprise:*:*:*

More vulnerabilities in Gitlab

CVE-2024-45409 — Critical (CVSS 10.0): The Ruby SAML library is for implementing the client side of a SAML authorization. Ruby-SAML in <= 12.2 and 1.13.0 <=…
CVE-2023-7028 — Critical (CVSS 10.0): An issue has been discovered in GitLab CE/EE affecting all versions from 16.1 prior to 16.1.6, 16.2 prior to 16.2.9,…
CVE-2023-2825 — Critical (CVSS 10.0): An issue has been discovered in GitLab CE/EE affecting only version 16.0.0. An unauthenticated malicious user can use a…
CVE-2022-0735 — Critical (CVSS 10.0): An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.10 before 14.6.5, all versions…
CVE-2021-22205 — Critical (CVSS 10.0): An issue has been discovered in GitLab CE/EE affecting all versions starting from 11.9. GitLab was not properly…
CVE-2019-9174 — Critical (CVSS 10.0): An issue was discovered in GitLab Community and Enterprise Edition before 11.6.10, 11.7.x before 11.7.6, and 11.8.x…

All CVEs affecting Gitlab →

Other CWE-1220 vulnerabilities

CVE-2025-31201 — Critical (CVSS 9.8): This issue was addressed by removing the vulnerable code. This issue is fixed in iOS 18.4.1 and iPadOS 18.4.1, macOS…
CVE-2022-2475 — Critical (CVSS 9.8): Haas Controller version 100.20.000.1110 has insufficient granularity of access control when using the "Ethernet Q…
CVE-2026-6356 — Critical (CVSS 9.6): A vulnerability in the web application allows standard users to escalate their privileges to those of a super…
CVE-2026-6388 — Critical (CVSS 9.1): A flaw was found in ArgoCD Image Updater. This vulnerability allows an attacker, with permissions to create or modify…
CVE-2025-8053 — Critical (CVSS 9.1): Insufficient Granularity of Access Control vulnerability in opentext Flipper allows Exploiting Incorrectly Configured…
CVE-2025-7493 — Critical (CVSS 9.1): A privilege escalation flaw from host to domain administrator was found in FreeIPA. This vulnerability is similar to…

Browse all CWE-1220 vulnerabilities →