CVE-2024-39308

RailsAdmin Cross-site Scripting vulnerability in the list view

               <% properties.map{ |property| property.bind(:object, object) }.each do |property| %>
                 <% value = property.pretty_value %>
-                <td class="<%= [property.sticky? && 'sticky', property.css_class, property.type_css_class].select(&:present?).join(' ') %>" title="<%= value %>">
+                <%= content_tag(:td, class: [property.sticky? && 'sticky', property.css_class, property.type_css_class].select(&:present?), title: strip_tags(value.to_s)) do %>
                   <%= value %>
-                </td>
+                <% end %>
               <% end %>

RailsAdmin list view has the XSS vulnerability, caused by improperly-escaped HTML title attribute.
The issue was originally reported in https://github.com/railsadminteam/rails_admin/issues/3686.

Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.

CVE-2024-39308 has a CVSS score of 6.8 (Medium). The vector is network-reachable, low privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (3.1.3); upgrading removes the vulnerable code path.

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Upgrade to 3.1.4. The vulnerability itself was patched in 3.1.3 but it has a functionality issue.
Initially the vulnerability was thought to exist in versions before 3.0, but it didn't. 2.x users can stay on 2.2.1.

1. What is CVE-2024-39308? CVE-2024-39308 is a medium-severity cross-site scripting (XSS) vulnerability in rails_admin (rubygems), affecting versions >= 3.0.0.beta, < 3.1.3. It is fixed in 3.1.3. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
2. How severe is CVE-2024-39308? CVE-2024-39308 has a CVSS score of 6.8 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of rails_admin are affected by CVE-2024-39308? rails_admin (rubygems) versions >= 3.0.0.beta, < 3.1.3 is affected.
4. Is there a fix for CVE-2024-39308? Yes. CVE-2024-39308 is fixed in 3.1.3. Upgrade to this version or later.
5. Is CVE-2024-39308 exploitable, and should I be worried? Whether CVE-2024-39308 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
6. What actually determines whether CVE-2024-39308 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.
7. How do I fix CVE-2024-39308? Upgrade rails_admin to 3.1.3 or later.

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