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Security Vulnerability in PHP Fusion v7 and v9
Zbigniew
The use of outdated versions of the jQuery library (such as 1.x, 2.x, or early 3.x releases) may pose a **serious security risk** to a website.

The **jQuery** project team officially states that older versions are no longer supported and do not receive security updates. This means that known vulnerabilities — including XSS (Cross-Site Scripting) issues — will not be patched in those versions.

Official information from the vendor:

* Support page (details about unsupported versions):
https://jquery.com/support

* Security fixes introduced in version 3.5.0 (including XSS vulnerability patches):
[url=[https://blog.jquery.com/2020/04/10/jquery-3-5-0-released/](https://blog.jquery.com/2020/04/10/jquery-3-5-0-released/)][https://blog.jquery.com/2020/04/10/jquery-3-5-0-released/[/url](https://blog.jquery.com/2020/04/10/jquery-3-5-0-released/[/url)]

It is strongly recommended to upgrade to the latest stable release of the library and to regularly audit all third-party dependencies.

Keeping software up to date significantly reduces the risk of known exploits and improves the overall security of the application.
Edited by Zbigniew on 23-02-2026 14:54
 
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