cve.bz

CVE-2019-5420

9.8 criticalEPSS 89%

A remote code execution vulnerability in development mode Rails <5.2.2.1, <6.0.0.beta3 can allow an attacker to guess the automatically generated development mode secret token. This secret token can be used in combination with other Rails internals to escalate to a remote code execution exploit.

Severity

CVSS 3.1

9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
89% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CWEs
CWE-330, CWE-77
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-m42h-mh85-4qgcRubyGemsrailties>=5.2.0 <5.2.2.15.2.2.1

References

Check your stackJSON