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WordPress 6.0.2 Patches Vulnerability That May Influence Hundreds of thousands of Legacy Websites

By Ionut Arghire on August 31, 2022

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The WordPress group this week introduced the discharge of model 6.0.2 of the content material administration system (CMS), with patches for 3 safety bugs, together with a high-severity SQL injection vulnerability.

Recognized within the WordPress Hyperlink performance, beforehand often known as ‘Bookmarks’, the problem solely impacts older installations, as the potential is disabled by default on new installations.

Nonetheless, the performance would possibly nonetheless be enabled on tens of millions of legacy WordPress websites even when they’re working newer variations of the CMS, the Wordfence group at WordPress safety firm Defiant says.

With a CVSS rating of 8.0, the safety flaw requires administrative privileges and isn’t straightforward to take advantage of in default configurations, however there may be plugins or themes that enable it to be triggered by customers with decrease privileges (similar to editor-level and under), Wordfence says.

“Weak variations of WordPress didn’t efficiently sanitize the restrict argument of the hyperlink retrieval question within the get_bookmarks operate, used to make sure that solely a sure variety of hyperlinks had been returned,” Wordfence explains.

Within the default configuration, solely the Hyperlinks legacy widget calls the operate in such a way that the person can set the restrict argument. Nonetheless, as a consequence of safeguards in legacy widgets, the vulnerability is nontrivial to take advantage of.

Each of the 2 remaining vulnerabilities addressed in WordPress 6.0.2 are medium-severity cross-site scripting (XSS) bugs induced by means of the ‘the_meta’ operate and by plugin deactivation and deletion errors.

Profitable exploitation of those vulnerabilities might result in the execution of both scripts injected in publish meta keys and values, or JavaScript code within the messages displayed when plugins are deactivated or deleted as a consequence of an error.

Web site directors are suggested to replace to WordPress 6.0.2 as quickly as doable (the replace is being mechanically delivered to websites that assist background updates). The patches have been backported to WordPress 3.7 and newer variations, the WordPress group notes.

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