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CVE-2021-36394 is a vulnerability in Moodle affecting the Shibboleth authentication plugin. The provided content states that a remote code execution risk was identified in this plugin. No further technical detail about the vulnerable function, code path, or exact root cause is available in the supplied material.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains two PHP exploit scripts targeting CVE-2021-36394, a PHP object injection vulnerability in Moodle. The first script (CVE2021-36394.php) demonstrates how to update arbitrary database fields, such as changing a user's password, by crafting a malicious serialized object and injecting it into a vulnerable parameter. The second script (CVE2021-36394_RCE.php) demonstrates remote code execution by allowing the attacker to specify a PHP function and parameter to be executed on the server. Both scripts require the attacker to provide the target Moodle URL and a valid MoodleSession cookie. The exploits interact with the endpoints '/grade/report/grader/index.php' (for payload injection) and '/auth/shibboleth/logout.php' (to trigger the payload). The repository also includes a README with usage instructions and references to a demo video and blog post. The code is operational and demonstrates real exploitation techniques, but requires some customization (e.g., session cookie, target URL, and payload parameters) to use against a live target.
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