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CVE-2021-41349 is a spoofing vulnerability in Microsoft Exchange Server. The vulnerability allows an attacker to impersonate a trusted entity by exploiting flaws in the way Exchange Server handles authentication or message validation. This could enable an attacker to send emails or perform actions that appear to originate from a legitimate source within the Exchange environment.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides a proof-of-concept (POC) exploit for CVE-2021-41349, a spoofing vulnerability in Microsoft Exchange Server. The repository contains three files: a LICENSE file (GPLv3), a README.md with usage instructions, and POC.html, which is the main exploit file. The POC.html file is a crafted HTML page that, when opened in a browser, submits a POST request to the Exchange autodiscover endpoint (https://mail.target.com/autodiscover/autodiscover.json) with malicious parameters. The exploit leverages a CSRF attack vector, attempting to inject a script tag as a parameter name, which may trigger the vulnerability if the target server is not properly secured. The README provides clear instructions for reproducing the exploit, including capturing a request and modifying the HTML file for the attacker's target. The exploit is a POC and does not include weaponized or automated payloads.
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