{"id":36161,"date":"2020-07-17T16:46:04","date_gmt":"2020-07-17T16:46:04","guid":{"rendered":"https:\/\/www.threatshub.org\/blog\/ew-thats-unsanitary-seo-plugin-for-wordpress-would-run-arbitrary-javascript-inputs-instead-of-scrubbing-them\/"},"modified":"2020-07-17T16:46:04","modified_gmt":"2020-07-17T16:46:04","slug":"ew-thats-unsanitary-seo-plugin-for-wordpress-would-run-arbitrary-javascript-inputs-instead-of-scrubbing-them","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/ew-thats-unsanitary-seo-plugin-for-wordpress-would-run-arbitrary-javascript-inputs-instead-of-scrubbing-them\/","title":{"rendered":"Ew, that&#8217;s unsanitary: SEO plugin for WordPress would run arbitrary JavaScript inputs instead of scrubbing them"},"content":{"rendered":"<div><img decoding=\"async\" src=\"https:\/\/regmedia.co.uk\/2018\/09\/06\/shutterstock_hand_scrubbing_brush.jpg\" class=\"ff-og-image-inserted\"><\/div>\n<p>A popular WordPress search engine optimisation plugin with around two million installs could have been abused to hijack a target website, according to a threat intel firm.<\/p>\n<p>&#8220;This flaw allowed authenticated users with contributor level access or above the ability to inject malicious scripts that would be executed if a victim accessed the wp-admin panel&#8217;s &#8216;all posts&#8217; page,&#8221; said WordPress-focused infosec biz Wordfence in a <a target=\"_blank\" rel=\"nofollow noopener noreferrer\" href=\"https:\/\/www.wordfence.com\/blog\/2020\/07\/2-million-users-affected-by-vulnerability-in-all-in-one-seo-pack\/\">blog post<\/a> about the vuln in the All in One SEO Pack plugin.<\/p>\n<p>The cross-site scripting (XSS) vuln could have been abused to hijack control of a targeted site from its operators. With WordPress powering a large number of high-profile websites, and All in One SEO being very popular (and free at its basic tier), the potential impact of the vuln was widespread.<\/p>\n<p>As its name suggests, the plugin is intended to make the appearance of one&#8217;s blog posts on Google search results a simple and automated process. Among other things, the plugin creates SEO-specific input fields on new posts with the aim of boosting the post&#8217;s search ranking in response to certain specified terms.<\/p>\n<p>&#8220;Unfortunately, the SEO meta data for posts, including the SEO title and SEO description fields, had no input sanitization allowing lower-level users like contributors and authors the ability to inject HTML and malicious JavaScript into those fields,&#8221; said Wordfence.<\/p>\n<p>Worse, JavaScript inserted into those fields &#8220;would also be executed when visiting the page directly if a closing tag was inserted by an attacker before adding their own script&#8221;. Instead of sanitising inputs, the plugin merely executed them \u2013 so escaping the plugin&#8217;s own &lt;\/script&gt; tag was trivially easy.<\/p>\n<p>Larger WordPress websites allow varying levels of user privileges: a Contributor can write whatever they want but their post must be approved by an Editor or Administrator before it is published. To do so, the higher-priv&#8217;d account must access the site&#8217;s &#8220;all posts&#8221; page in the backend. An attacker who compromised a lower-level account could insert arbitrary JS into the SEO plugin metadata fields, with that JS being executed once the admin opened the draft post for editing.<\/p>\n<p>All in One SEO Pack&#8217;s devs have now patched the vuln in version 3.6.2 by sanitising inputs. Users of the popular plugin should install the latest update.<\/p>\n<p>&#8220;If someone calls you, sends you an email, or contacts you in any way saying they need access to your site for any reason, and it&#8217;s not coming from someone you know and trust, then it might be a social engineering attempt. Never provide credentials or user account access unless you can trust and verify who you are providing that information to,&#8221; urged Wordfence, adding that blog admins should enable 2FA where possible to harden all account privilege levels against takeovers. \u00ae<\/p>\n<p> READ MORE <a href=\"https:\/\/go.theregister.com\/feed\/www.theregister.com\/2020\/07\/17\/all_in_one_seo_pack_javascript_sanitisation_vuln\/\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>XSS vuln could hijack websites so update your All in One pack A popular WordPress search engine optimisation plugin with around two million installs could have been abused to hijack a target website, according to a threat intel firm.\u2026 READ MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":36162,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[63],"tags":[],"class_list":["post-36161","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-the-register"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ew, that&#039;s unsanitary: SEO plugin for WordPress would run arbitrary JavaScript inputs instead of scrubbing them 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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