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.

CVSS v3.1

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

88.14% chance of exploitation in the next 30 days, 100th percentile

Nuclei

critical · CWE-78

Published

2021-10-26

Updated

2024-08-03

Proof-of-concept exploits (6)

• http://packetstormsecurity.com/files/164705/Movable-Type-7-r.5002-XMLRPC-API-Remote-Comma…
• Cosemz/CVE-2021-208370★ · 2021-11-02
• byteofandri/CVE-2021-2083721★ · 2022-03-21
• byteofjoshua/CVE-2021-2083721★ · 2022-03-21
• ghost-nemesis/cve-2021-20837-poc18★ · 2021-10-26
• orangmuda/CVE-2021-2083721★ · 2022-03-21

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-20837.yaml

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/50464

References

• CVE Record
• NVD entry

Related

• CVE-2018-15961
• CVE-2021-21972
• CVE-2021-22893
• CVE-2021-26084
• CVE-2021-27651
• CVE-2021-30573