WordPress Redux Plugin Vulnerability Affects +1 Million Sites

Redux, a well-liked WordPress plugin with greater than 1 million lively installations lately patched a vulnerability. The vulnerability allowed an attacker to circumvent security features in a Cross-Site Request Forgery (CSRF) assault.

Cross-Site Request Forgery

A Cross-Site Request Forgery (CSRF) assault is a technique the place an attacker exploits a vulnerability within the code that permits them to carry out movements on a website online. This roughly assault exploits the credentials of an authenticated person.

The U.S. Department of Commerce defines CSRF like this:

“A type of Web exploit where an unauthorized party causes commands to be transmitted by a trusted user of a Web site without that user’s knowledge.”

This specific assault bypassed safety tests by exploiting a coding trojan horse that brought about a website to improperly validate safety tokens referred to as nonces. Nonces are meant to give protection to paperwork and URLs from assaults.


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The WordPress developer web page describes nonces:

“WordPress nonces are one-time use security tokens generated by WordPress to help protect URLs and forms from misuse.

If your theme allows users to submit data; be it in the Admin or the front-end; nonces can be used to verify a user intends to perform an action, and is instrumental in protecting against Cross-Site Request Forgery(CSRF).

The one-time use hash generated by a nonce, prevents this type of forged attacks from being successful by validating the upload request is done by the current logged in user. Nonces are unique only to the current user’s session, so if an attempt is made to log in or out any nonces on the page become invalid.”


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The flaw used to be in how the nonces have been validated. This vulnerability used to be initially mounted in October 2020 however used to be reintroduced in a later replace.

According to the WPScan safety plugin website:

“The plugin did not properly validate some nonces, only checking them if their value was set. As a result, CSRF attacks could still be performed by not submitting the nonce in the request, bypassing the protection they are supposed to provide.”

WPScan and the WordPress Redux plugin each reported that the CSRF vulnerability has been mounted.

WPScan described the current issue:

“The plugin re-introduced a CSRF bypass issue in v4.1.22, as the nonce is only checked if present in the request.”

The Redux Plugin changelog states:

“Fixed: CSRF security issue with a flipped if conditional.”

Update Redux Gutenberg Blocks Library & Framework

Redux is a plugin that permits publishers to browse and make a choice from 1000’s of Gutenberg blocks and templates. Blocks are sections of a internet web page and templates are whole internet web page designs.

With over one million lively customers, Redux plugin is likely one of the maximum used WordPress plugins.

It is extremely beneficial that publishers the use of the Redux WordPress plugin straight away replace to the most recent model, 4.1.24.

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