CVE-2011-4969: Cross-Site Scripting (XSS) in jQuery
Summary
CVE-2011-4969: jQuery vulnerable to Cross-Site Scripting (XSS). Affects jquery versions < 1.6.3. Fixed in 1.6.3. How to fix ↓
Also tracked for
- jquery · Debian:10
The same CVE-2011-4969 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
jQuery is a popular JavaScript library that simplifies HTML document traversal, event handling, and animation. It is widely used to enhance the functionality and interactivity of web pages. However, versions prior to 1.6.3 are vulnerable to a Cross-Site Scripting (XSS) attack when using location.hash to select elements. This vulnerability allows remote attackers to inject arbitrary web script or HTML by exploiting a crafted tag.
Vulnerability Detail
The vulnerability in jQuery arises from improper handling of user input when using location.hash to select elements. By manipulating the hash value in the URL, an attacker can inject malicious script or HTML code into the targeted web page. This can lead to various security issues, including session hijacking, defacement, and stealing sensitive user information. It is important to note that this vulnerability was addressed in version 1.6.3 of jQuery.
How To Fix
Latest published version: 4.0.0 as of 23 Oct 2026
npm install jquery@4.0.0Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
1.6.3
This is the first release that contains the fix.
npm install jquery@1.6.3Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If updating the jQuery package is not immediately feasible, a temporary workaround can be implemented by avoiding the use of location.hash to select elements. Instead, developers should consider using alternative methods or libraries that do not introduce this vulnerability. For example, using document.getElementById or other DOM manipulation techniques can help mitigate the risk of XSS attacks.
Conclusion
The Cross-Site Scripting (XSS) vulnerability in jQuery versions prior to 1.6.3 can have serious security implications for web applications. It is crucial to promptly update to the latest version of jQuery and implement proper input validation and sanitization techniques to mitigate the risk of XSS attacks. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
Cross-Site Scripting (XSS) is a type of security vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. This can lead to various attacks, such as session hijacking, defacement, and data theft.
If your application uses a vulnerable version of jQuery and relies on location.hash to select elements, it is susceptible to Cross-Site Scripting (XSS) attacks. This can result in the execution of arbitrary code on the client-side, compromising the security and integrity of your application.
Yes, the vulnerability has been addressed in version 1.6.3 of jQuery. It is highly recommended to update to this version or a later release to mitigate the risk of XSS attacks.
While specific exploits targeting this vulnerability may exist, it is important to note that the details of such exploits are typically not publicly disclosed to prevent further harm. However, it is advisable to assume that attackers are actively looking for and exploiting vulnerabilities in widely used libraries like jQuery.
You can use Vulert's playground (https://vulert.com/scanner) to check if your application is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities, using just the package-lock.json file. It provides an easy way to assess the security of your application without requiring access to the code or installation.
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