Cross-site Scripting Vulnerability in Ruby Package - CVE-2015-9251

ruby Updated 02 Oct 2025

Summary

18/01/2018
N/A
Yes i
Medium
6.1

ALPINE-CVE-2015-9251: jQuery before 3.0.0 is vulnerable to Cross-site Scripting (XSS) attacks when a cross-domain Ajax request is performed without the dataType option, causing text/javascript responses to be executed. Affects ruby versions < 2.5.6-r0. Fixed in 2.5.6-r0. How to fix ↓

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Background

Ruby is a dynamic, open-source programming language with a focus on simplicity and productivity. It has an elegant syntax that is natural to read and easy to write. However, certain versions of Ruby are vulnerable to Cross-site Scripting (XSS) attacks due to improper handling of cross-domain Ajax requests, particularly when the dataType option is not specified.

Vulnerability Detail

The vulnerability identified as CVE-2015-9251 affects jQuery versions prior to 3.0.0. It arises when a cross-domain Ajax request is made without the dataType option, allowing text/javascript responses to be executed. This can lead to XSS attacks, where an attacker could inject malicious scripts into web pages viewed by users, potentially compromising user data and session integrity.

How To Fix

Minimum fixed version

2.5.6-r0

This is the first release that contains the fix.

sudo apk add --upgrade ruby

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Workaround

As a temporary workaround, always specify the dataType option in your Ajax requests to prevent the execution of potentially harmful scripts. For example: $.ajax({ url: 'your-url', dataType: 'json', success: function(data) {

console.log(data);

} });

Conclusion

CVE-2015-9251 is a significant vulnerability affecting the Ruby package due to improper handling of Ajax requests in jQuery. It is crucial to update to the patched version or implement workarounds to safeguard against potential XSS attacks.

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FAQ

CVE-2015-9251 is a vulnerability in jQuery that allows for Cross-site Scripting (XSS) attacks when cross-domain Ajax requests are made without specifying the dataType option.

You can use Vulert to monitor and alert for open-source vulnerabilities in your software. By checking your manifest file like package-lock.json, you can identify if your application is affected by CVE-2015-9251.

If exploited, this vulnerability can allow attackers to execute malicious scripts in the context of the user's session, potentially leading to data theft, session hijacking, or other malicious activities.

Yes, you can mitigate the risk by ensuring that the dataType option is always specified in your Ajax requests to prevent the execution of harmful scripts.

The CVSS score for CVE-2015-9251 is 6.1, indicating a medium severity level.

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How To Fix

Minimum fixed version

2.5.6-r0

This is the first release that contains the fix.

sudo apk add --upgrade ruby

Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →

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