Due to the misuse of the add_query_arg() and remove_query_arg() functions, several WordPress plugins and themes are vulnerable to Cross-site Scripting (XSS). These functions are used by web developers to adjust and add query strings to URLs within WordPress. The vulnerability is caused by a common code pattern used in WordPress plugins and themes purchased through ThemeForest, CodeCanyon, WordPress.org and other sources.
Since there is no way of knowing the exact amount of plugins or themes affected, it is recommended to periodically check your plugins and apply any updates as soon as possible.
Here are some of the plugins that are affected:
All developers using WordPress websites should log in to the WordPress admin dashboard and update any out of date plugins.
In order to decrease your risk of threat and improve security, here are a few tips to consider:
It is important to always keep your WordPress installation and associated plugins and themes up to date. If you still have concerns, we suggest engaging with an experienced WordPress developer to check whether your site is affected.
For more information regarding the XSS vulnerability security advisory, refer to this link: Security Advisory: XSS Vulnerability Affecting Multiple WordPress Plugins
References: https://sucuri.net/
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