RCE in Sixapart Movable_type
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 (Movabl…
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.881 (99.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Sixapart Movable_type
- Six Apart Ltd. Movable Type — versions 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
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vultures@jpcert.or.jp (x_refsource_MISC, Release Notes, Vendor Advisory)
- vultures@jpcert.or.jp (Third Party Advisory, x_refsource_MISC)
- vultures@jpcert.or.jp (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
- vultures@jpcert.or.jp (VDB Entry, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-20837?
- CVE-2021-20837 is a critical-severity vulnerability in Sixapart Movable_type, classified under OS Command Injection. CVSS score: 9.8/10. Published 2021-10-26.
- How severe is CVE-2021-20837?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-20837 known to be exploited?
- 28 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.