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WordPress, however, is a PHP application and does not run on Node.js so the impact of these vulnerabilities are limited.
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In cases where the webserver is running JavaScript such as with Node.js, this can be used to achieve critical-severity exploits such as Remote Code Execution. Prototype pollution vulnerabilities allow attackers to inject key/value “properties” into JavaScript objects and are in many ways similar to PHP Object Injection vulnerabilities. JavaScript running in an administrator’s session can be used to take over a site via several methods including the addition of new malicious administrative users and the injection of backdoors into a website.ĭescription: Prototype Pollution via the Gutenberg wordpress/url packageĪffected Versions: WordPress Core < 5.9.2ĬVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:Lĭescription: Prototype Pollution in jQuery An attacker able to successfully exploit this vulnerability could inject malicious JavaScript into a post, which, when previewed by an administrator, would execute. This vulnerability does require the attacker to have the ability to edit posts, and as such they would need access to the account of at least a Contributor-level user.
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The patched version runs wp_filter_global_styles_post before wp_filter_post_kses so that any potential bypasses have already been processed and wp_kses can effectively sanitize them. Normally this would not be an issue, but wp_filter_global_styles_post performs a second round of JSON decoding on the content it has been passed, which allows for a number of bypasses that would normally be handled by wp_kses. Unfortunately, however, the wp_filter_global_styles_post function ran after wp_filter_post_kses.
Wordpress 5.9 download full#
Recent versions of WordPress allow some degree of full site editing, including global styles, which use their own sanitization function wp_filter_global_styles_post. WordPress uses a function called wp_kses to remove malicious scripts from posts, which is called in wp_filter_post_kses whenever post content is saved.
Wordpress 5.9 download download#
JB Audras thanked all the contributors.Change Mirror Download Contributor+ Stored Cross Site Scripting VulnerabilityĪffected Versions: WordPress Core 5.9.0-5.9.1ĬVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H JB Audras and George Mamadashvili co-led this release with contributions from 88 other contributors. Since its release on January 25, WordPress 5.9 has been downloaded over 35 million times already. This is the first minor release after the major release of WordPress 5.9.
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Wordpress 5.9 download update#
Websites that support automatic background updates are already beginning to update to v5.9.1.Įven though this is only a maintenance release, we advise all of you to update your sites as soon as possible and stay up-to-date. Check out some of the easiest ways to update WordPress. You can either directly download v5.9.1 or venture over to Dashboard > Updates and simply click “ Update Now”. The next major release will be version 6.0. The WordPress 5.9.1 update is a maintenance release and includes a total of 82 bug fixes in both Core and the block editor.Īccording to the official release announcement, WordPress 5.9.1 release is a short-cycle maintenance release. The update carries many crucial updates with it.
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WordPress issued this maintenance release yesterday on February 22, 2022. The first maintenance release after the major update is here! WordPress 5.9.1 Maintenance Release is now available for download and you can start testing the new version.