CVE-2018-12542
CVSS v3
9.8
CRITICAL
EPSS Score
2.3 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
In version from 3.0.0 to 3.5.3 of Eclipse Vert.x, the StaticHandler uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '\\' (forward slashes) sequences that can resolve to a location that is outside of that directory when running on Windows Operating Systems.
Technical details
- Published
- 2018-10-10
Frequently asked questions
What is CVE-2018-12542?
In version from 3.0.0 to 3.5.3 of Eclipse Vert.x, the StaticHandler uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '\\' (forward slashes) sequences that can resolve to a location that is outside of that directory when running on Windows Operating Systems.
Is CVE-2018-12542 actively exploited?
Active exploitation of CVE-2018-12542 has not been confirmed. Its EPSS score was 2.3% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2018-12542?
CVE-2018-12542 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2018-12542 affecting your environment?
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