Summary
jquery-rails and jquery-ujs subject to Exposure of Sensitive Information
jquery_ujs.js in jquery-rails before 3.1.3 and 4.x before 4.0.4 and rails.js in jquery-ujs before 1.0.4, as used with Ruby on Rails 3.x and 4.x, allow remote attackers to bypass the Same Origin Policy, and trigger transmission of a CSRF token to a different-domain web server, via a leading space character in a URL within an attribute value.
Impact
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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jquery-rails to 3.1.3 or later; jquery-rails to 4.0.4 or later; jquery-ujs to 1.0.4 or later
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is CVE-2015-1840? CVE-2015-1840 is a medium-severity security vulnerability in jquery-rails (rubygems), affecting versions < 3.1.3. It is fixed in 3.1.3, 4.0.4, 1.0.4.
- Which packages are affected by CVE-2015-1840?
jquery-rails(rubygems) (versions < 3.1.3)jquery-ujs(rubygems) (versions < 1.0.4)
- Is there a fix for CVE-2015-1840? Yes. CVE-2015-1840 is fixed in 3.1.3, 4.0.4, 1.0.4. Upgrade to this version or later.
- Is CVE-2015-1840 exploitable, and should I be worried? Whether CVE-2015-1840 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2015-1840 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2015-1840?
- Upgrade
jquery-railsto 3.1.3 or later - Upgrade
jquery-railsto 4.0.4 or later - Upgrade
jquery-ujsto 1.0.4 or later
- Upgrade