Back to Database
Status published
Critical
CVE-2019-5420
A remote code execution vulnerability in development mode Rails <5.2.2.1,...
Vulnerability Description
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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
THREAT MONITOR
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2019-5420
Credits & Attribution
No credits recorded in the NVD database.
References
- https://weblog.rubyonrails.org/2019/3/13/Rails-4-2-5-1-5-1-6-2-have-been-released/
- https://groups.google.com/forum/#%21topic/rubyonrails-security/IsQKvDqZdKw
- http://packetstormsecurity.com/files/152704/Ruby-On-Rails-DoubleTap-Development-Mode-secret_key_base-Remote-Code-Execution.html
- https://www.exploit-db.com/exploits/46785/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y43636TH4D6T46IC6N2RQVJTRFJAAYGA/
More from Rails
View All →CVE-2025-24293
# Active Storage allowed transformation methods potentially unsafe
Active Storage attempts...
Critical
9.2
CVE-2023-38037
ActiveSupport::EncryptedFile writes contents that will be encrypted to a
temporary file....
Medium
5.5
CVE-2023-28362
The redirect_to method in Rails allows provided values to contain...
Unknown
0
CVE-2023-28120
There is a vulnerability in ActiveSupport if the new bytesplice...
Unknown
0
CVE-2023-27539
There is a denial of service vulnerability in the header...
Unknown
0
Affected Vendor
Rails
View all reports →Affected Software
https://github.com/rails/rails
Vulnerable Versions:
5.2.2.1, 6.0.0.beta3
Timeline
Official Publish:
March 27th, 2019
Last Modified:
August 4th, 2024
Added to House:
July 20th, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H