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CVE-2018-9243

21
FAUCET Score

CVE-2018-9243 is a cross-site scripting (XSS) vulnerability affecting GitLab Community and Enterprise Editions versions 8.4 through 10.4. The flaw stems from insufficient input validation in the merge request component, specifically concerning filenames displayed in changes tabs. This medium-severity vulnerability (CVSS 6.1) can be exploited remotely with low attack complexity, requiring user interaction, and could lead to limited compromise of confidentiality and integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or KEV listing, though it has received minimal community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.4, < 10.4.7CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
>= 8.4, < 10.4.7CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
>= 10.5.0, < 10.5.7CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
>= 10.5.0, < 10.5.7CPE matchmatch criteria
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
>= 10.6.0, < 10.6.3CPE 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
1.00%
Probability of exploitation in next 30 days
EPSS Percentile
59.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0100 is in the 71st percentile among its peer group of 26,220 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 / 2018/04/04/security-release-gitlab-10-dot-6-dot-3-released
Vendor Advisory
gitlab.com / gitlab-org/gitlab-ce/issues/42028
ExploitVendor Advisory