Platform
rails
Component
thor
Opgelost in
1.4.0
CVE-2025-54314 describes a potential vulnerability in Thor, a Ruby library, where an unsafe shell command can be constructed from library input. While the vendor disputes the severity, the possibility of arbitrary code execution exists if an attacker can influence the arguments passed to the vulnerable method. This vulnerability impacts Thor versions 0.0 through 1.3.9 and is resolved in version 1.4.0.
The core of this vulnerability lies in Thor's handling of library input when constructing shell commands. If an attacker can manipulate the input used by Thor to build these commands, they could inject malicious code that would be executed by the system's shell. Although the vendor claims the vulnerable method only uses controlled arguments, the potential for exploitation remains if these controls are bypassed or misconfigured. Successful exploitation could lead to arbitrary code execution, allowing an attacker to gain control of the affected system and potentially access sensitive data or compromise the entire application.
CVE-2025-54314 has a LOW CVSS score of 2.8. As of the publication date (2025-07-20), there are no publicly available proof-of-concept exploits. The vendor's dispute regarding the vulnerability's severity suggests a low probability of active exploitation, but the potential for code execution warrants careful attention and mitigation.
Ruby on Rails applications utilizing Thor versions 0.0 through 1.3.9 are at risk. Specifically, applications that rely on Thor for task execution or system administration functions are more vulnerable. Developers who have not recently reviewed their dependencies or implemented robust input validation are also at increased risk.
• rails / ruby: Inspect Thor library versions in Gemfile and Gemfile.lock. Check for unusual command execution patterns in application logs.
gem list thor• generic web: Monitor application logs for unusual shell command execution attempts. Review Thor configuration files for potential vulnerabilities.
disclosure
Exploit Status
EPSS
0.02% (5% percentiel)
CISA SSVC
CVSS-vector
The primary mitigation for CVE-2025-54314 is to upgrade Thor to version 1.4.0 or later, which addresses the unsafe shell command construction issue. If upgrading is not immediately feasible, consider implementing input validation and sanitization on any data passed to Thor's vulnerable methods. Employing a Web Application Firewall (WAF) with rules to detect and block suspicious shell command patterns could provide an additional layer of defense. Carefully review Thor's configuration to ensure that only trusted and validated input is used.
Actualice la gema Thor a la versión 1.4.0 o superior. Esto solucionará la vulnerabilidad de construcción de comandos shell inseguros. Ejecute `gem update thor` para actualizar.
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CVE-2025-54314 is a vulnerability in Thor versions 0.0 - 1.3.9 where an unsafe shell command can be constructed from library input, potentially leading to code execution. The vendor disputes the severity, but upgrading is recommended.
You are affected if your Ruby on Rails application uses Thor versions 0.0 through 1.3.9. Check your Gemfile and Gemfile.lock to determine your Thor version.
Upgrade Thor to version 1.4.0 or later. If upgrading is not possible, implement input validation and consider using a WAF.
As of the publication date, there are no publicly known exploits, but the potential for code execution warrants mitigation.
Refer to the Thor project's official website and GitHub repository for updates and advisories related to CVE-2025-54314.
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