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CVE-2018-18643

21
FAUCET Score

CVE-2018-18643 describes a persistent Cross-Site Scripting (XSS) vulnerability affecting GitLab CE and EE versions 11.2 and later, prior to 11.5.0-rc12, 11.4.6, and 11.3.10. This medium-severity vulnerability (CVSS 6.1) has a network attack vector and low attack complexity, requiring user interaction (UI:R) to achieve partial impact on confidentiality and integrity. There is no evidence of active exploitation, nor are public exploit codes like Metasploit or ExploitDB modules available. While it has garnered some community discussion and media coverage, it is not listed on the CISA KEV catalog or Hot List, indicating a lower immediate threat.

Impacted Technologies

VendorProductVersion(s)CPE
<= 11.2.0CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
<= 11.2.0CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
>= 11.3.0, < 11.3.10CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
>= 11.3.0, < 11.3.10CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
>= 11.4.0, < 11.4.6CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.16%
Probability of exploitation in next 30 days
EPSS Percentile
63.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0116 is in the 77th percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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 / 2018/11/19/critical-security-release-gitlab-11-dot-4-dot-6-released
Vendor Advisory
about.gitlab.com / blog/categories/releases
Vendor Advisory
gitlab.com / gitlab-org/gitlab-ce/issues/53385
PatchVendor Advisory