{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-4484/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["critical"],"_cs_tags":["wordpress","privilege-escalation","cve-2026-4484"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eThe Masteriyo LMS plugin, a learning management system for WordPress, contains a privilege escalation vulnerability (CVE-2026-4484) affecting versions up to and including 2.1.6. This flaw allows authenticated users, even those with low-level \u0026ldquo;Student\u0026rdquo; access, to elevate their privileges to that of an administrator. The vulnerability stems from a lack of proper authorization checks within the \u003ccode\u003eInstructorsController::prepare_object_for_database\u003c/code\u003e function, enabling malicious users to modify user roles. Successful exploitation grants attackers full control over the WordPress site, leading to potential data breaches, defacement, or complete takeover. This vulnerability poses a significant threat to educational institutions and other organizations using the Masteriyo LMS plugin.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker authenticates to the WordPress site as a student or with any role above student.\u003c/li\u003e\n\u003cli\u003eAttacker crafts a malicious HTTP request targeting the REST API endpoint associated with the \u003ccode\u003eInstructorsController\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eThe attacker includes a modified user role parameter within the request, specifically attempting to change their role to \u0026ldquo;administrator.\u0026rdquo;\u003c/li\u003e\n\u003cli\u003eThe request is sent to the \u003ccode\u003e/wp-json/masteriyo/v1/instructors\u003c/code\u003e endpoint.\u003c/li\u003e\n\u003cli\u003eThe \u003ccode\u003eInstructorsController::prepare_object_for_database\u003c/code\u003e function processes the request without proper authorization checks.\u003c/li\u003e\n\u003cli\u003eThe function updates the attacker\u0026rsquo;s user role in the WordPress database to \u0026ldquo;administrator\u0026rdquo;.\u003c/li\u003e\n\u003cli\u003eThe attacker logs out and back in to the WordPress site.\u003c/li\u003e\n\u003cli\u003eThe attacker now has full administrator privileges and can perform any action within the WordPress site.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this vulnerability allows any authenticated user to gain complete control over the affected WordPress site. This can lead to significant data breaches, where sensitive student or course data is compromised. The attacker can deface the website, install malicious plugins, or even completely take over the server. Given the widespread use of WordPress and the Masteriyo LMS plugin in educational settings, a successful attack could impact thousands of students and instructors.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eImmediately update the Masteriyo LMS plugin to the latest available version, which patches CVE-2026-4484.\u003c/li\u003e\n\u003cli\u003eMonitor WordPress web server logs for suspicious POST requests to \u003ccode\u003e/wp-json/masteriyo/v1/instructors\u003c/code\u003e attempting to modify user roles.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule provided below to detect potential exploitation attempts targeting the vulnerable \u003ccode\u003eInstructorsController::prepare_object_for_database\u003c/code\u003e function.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-03-26T02:16:07Z","date_published":"2026-03-26T02:16:07Z","id":"/briefs/2026-03-masteriyo-privesc/","summary":"The Masteriyo LMS plugin for WordPress is vulnerable to privilege escalation, allowing authenticated users with student-level access or higher to gain administrator privileges by manipulating the 'InstructorsController::prepare_object_for_database' function.","title":"Masteriyo LMS WordPress Plugin Privilege Escalation Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-03-masteriyo-privesc/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-4484","version":"https://jsonfeed.org/version/1.1"}