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CVE-2018-17939

23
FAUCET Score

CVE-2018-17939 is an information exposure vulnerability affecting GitLab Community and Enterprise Editions prior to versions 11.1.8, 11.2.5, and 11.3.2. This flaw allows unauthorized access to sensitive data through the merge request JSON endpoint. Rated with a CVSS score of 7.5 (High), it presents a low-complexity network-based attack vector with high confidentiality impact, requiring no user interaction. There is no evidence of active exploitation, publicly available exploit code, or inclusion in CISA's KEV catalog, though it has received some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 11.1.0, < 11.1.8CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
>= 11.1.0, < 11.1.8CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
>= 11.2.0, < 11.2.5CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
>= 11.2.0, < 11.2.5CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
>= 11.3.0, < 11.3.2CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.17%
Probability of exploitation in next 30 days
EPSS Percentile
64.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0117 is in the 43rd percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

about.gitlab.com / 2018/10/05/critical-security-release-11-3-4
Vendor Advisory
gitlab.com / gitlab-org/gitlab-ce/issues/51956
ExploitIssue TrackingVendor Advisory