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CVE-2018-20507

19
FAUCET Score

CVE-2018-20507 is an Incorrect Access Control vulnerability affecting GitLab Enterprise Edition versions 11.2.x through 11.4.12, 11.5.x through 11.5.5, and 11.6.0. This medium-severity vulnerability (CVSS 5.3) can be exploited remotely with low complexity, potentially leading to unauthorized modification of data, though confidentiality and availability are not impacted. There is no evidence of active exploitation, nor are there public exploit modules or proof-of-concept code available. Despite limited community discussion, the vulnerability received media coverage from GitLab's security release.

Impacted Technologies

VendorProductVersion(s)CPE
>= 11.2.0, < 11.4.13CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
>= 11.2.0, < 11.4.13CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
>= 11.5.0, < 11.5.6CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
>= 11.5.0, < 11.5.6CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
>= 11.6.0, < 11.6.1CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.77%
Probability of exploitation in next 30 days
EPSS Percentile
51.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0077 is in the 32nd percentile among its peer group of 23,723 CVEs.

Social Chatter

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

Media Mentions

The average CVE in this peer group has 0.0 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 / 2018/12/31/security-release-gitlab-11-dot-6-dot-1-released
Vendor Advisory