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- #Visual composer license key crack Patch#
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J– Initial discovery of the vulnerability. By using a user account with only editor capabilities while editing, creating, and checking on posts created by lower-level users, an XSS exploitation attempt could be limited, as an attacker can’t successfully add new admin accounts or edit themes through an Editor account.Įspecially in cases where many users can access authenticated actions, we recommend using an administrative user account only when you need to perform administrative functions on your site. When you access a page as a site administrator, any malicious JavaScript that an attacker injects can use administrative only functions like adding a new user or editing a theme file to further infect the site. This can be done by using one user account with administrative capabilities for admin-related tasks like adding new users and plugins and another user account with editor capabilities used to review and approve author and contributor posts.ĭoing so will limit the impact that a Cross-Site Scripting vulnerability may have. Dual account control uses two accounts for any user that may require administrative capability. One strategy to keep your site protected from Cross-Site Scripting attacks against higher-privileged accounts is to use dual accounts. In addition, users without the appropriate privileges can no longer edit other users’ posts, access the page builder unless permitted, or use shortcodes that could allow the injection of malicious JavaScript. In the latest version of WPBakery, lower level users no longer have unfiltered_html capabilities by default, however, administrators can grant that permission if they wish to. By executing malicious JavaScript in the administrator’s browser, it would be possible for an attacker to create a new malicious administrative user or inject a backdoor, among many other things. As contributor-level users require approval before publishing, it is highly likely that an administrator would view a page containing malicious JavaScript created by an attacker with contributor-level access. Furthermore, contributor and author level users were able to use the vc_raw_js, vc_raw_html, and button using custom_onclick shortcodes to add malicious JavaScript to posts.Īll of these meant that a user with contributor-level access could inject scripts in posts that would later execute once someone accessed the page or clicked a button, using various different methods. This made it possible for an attacker to inject malicious JavaScript in a button that would execute on a click of the button.
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The plugin also had custom onclick functionality for buttons.
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This could be classified as a general bug as well as a security issue, and is what made it possible for contributors and editors to use the wp_ajax_vc_save AJAX action and corresponding saveAjaxFe function to inject malicious JavaScript on their own posts as well as other users’ posts. Remove_filter( 'content_save_pre', 'balanceTags', 50 ) įurthermore, while WPBakery only intended pages that were built with the WPBakery page builder to be editable via the builder, users could access the editor by supplying the correct parameters and values for any post. $post_title = vc_post_param( 'post_title' ) $post_status = vc_post_param( 'post_status' ) $post->post_content = stripslashes( vc_post_param( 'content' ) ) $post_id = intval( vc_post_param( 'post_id' ) )
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Wordfence free users received the same protection on August 28, 2020.ĭescription: Authenticated Stored Cross-Site Scripting (XSS)Īffected Versions: checkAdminNonce()->validateDie()->wpAny( 'edit_posts', 'edit_pages' )->validateDie() Wordfence Premium users have been protected against exploits targeting these vulnerabilities since July 28, 2020. While doing so, we also recommend verifying that you do not have any untrusted contributor or author user accounts on your WordPress site. We highly recommend updating to the latest version, 6.4.1 as of today, immediately.
#Visual composer license key crack Patch#
After a long period of correspondence with the plugin development team, and a number of insufficient patches, a final sufficient patch was released on September 24, 2020. They confirmed the vulnerability and reported that their development team had begun working on a fix on July 31, 2020.
#Visual composer license key crack full#
After receiving confirmation of the appropriate support channel, we disclosed the full details on July 29, 2020. We initially reached out to the plugin’s team on Jthrough their support forum. This flaw made it possible for authenticated attackers with contributor-level or above permissions to inject malicious JavaScript in posts. On July 27th, our Threat Intelligence team discovered a vulnerability in WPBakery, a WordPress plugin installed on over 4.3 million sites.