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CVE-2021-42237 is a remote code execution vulnerability in Sitecore Experience Platform (XP) affecting versions from 7.5 Initial Release through 8.2 Update-7. The flaw is caused by insecure deserialization of untrusted data, allowing an unauthenticated remote attacker to trigger deserialization in a way that results in arbitrary command execution on the underlying server. The issue is exploitable without authentication and does not require special configuration, making exposed vulnerable Sitecore XP instances susceptible to pre-auth compromise.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module targeting CVE-2021-42237, a pre-authentication deserialization remote code execution vulnerability in Sitecore Experience Platform (XP) versions 7.5 to 8.2.7 on Windows. The exploit abuses the Report.ashx handler, which is accessible without authentication, to send a maliciously crafted XML payload that triggers .NET deserialization via the NetDataContractSerializer. The module supports multiple payload types, including direct command execution, binary droppers, and PowerShell stagers, allowing for flexible post-exploitation. Upon successful exploitation, the attacker gains code execution as the IIS user (NT AUTHORITY\NETWORK SERVICE), with the possibility of further privilege escalation. The main fingerprintable endpoint is '/sitecore/shell/ClientBin/Reporting/Report.ashx'. The code is written in Ruby and is fully integrated into the Metasploit framework, making it weaponized and easy to use for penetration testers and attackers alike.
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4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A pre-authentication deserialization remote code execution vulnerability in Sitecore Experience Platform (XP).
A vulnerability in Sitecore Experience Platform that can be exploited for unauthorized access, used by GOLD MELODY.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.