CVE-2021-20837

Movable Type 7 r.5002 and earlier (Movable Type 7 Series), Movable Type 6.8.2 and earlier (Movable Type 6 Series), Movable Type Advanced 7 r.5002 and earlier (Movable Type Advanced 7 Series), Movable Type Advanced 6.8.2 and earlier (Movable Type Advanced 6 Series), Movable Type Premium 1.46 and earlier, and Movable Type Premium Advanced 1.46 and earlier allow remote attackers to execute arbitrary OS commands via unspecified vectors. Note that all versions of Movable Type 4.0 or later including unsupported (End-of-Life, EOL) versions are also affected by this vulnerability.

• CWE-78

• http://packetstormsecurity.com/files/164705/Movable-Type-7-r.5002-XMLRPC-API-Remote-Command-Injection.htmlExploit, Third Party Advisory, VDB Entry
• http://packetstormsecurity.com/files/164818/Movable-Type-7-r.5002-XMLRPC-API-Remote-Command-Injection.htmlThird Party Advisory, VDB Entry
• https://jvn.jp/en/jp/JVN41119755/index.htmlThird Party Advisory
• https://movabletype.org/news/2021/10/mt-782-683-released.htmlRelease Notes, Vendor Advisory
• http://packetstormsecurity.com/files/164705/Movable-Type-7-r.5002-XMLRPC-API-Remote-Command-Injection.htmlExploit, Third Party Advisory, VDB Entry
• http://packetstormsecurity.com/files/164818/Movable-Type-7-r.5002-XMLRPC-API-Remote-Command-Injection.htmlThird Party Advisory, VDB Entry
• https://jvn.jp/en/jp/JVN41119755/index.htmlThird Party Advisory
• https://movabletype.org/news/2021/10/mt-782-683-released.htmlRelease Notes, Vendor Advisory

Published

Oct 26, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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