CVE-2020-5577: Sixapart Movable Type

High severity, CVSS 8.8. EPSS: 1.7% chance of exploitation in the next 30 days.

Movable Type series (Movable Type 7 r.4606 (7.2.1) and earlier (Movable Type 7), Movable Type Advanced 7 r.4606 (7.2.1) and earlier (Movable Type Advanced 7), Movable Type for AWS 7 r.4606 (7.2.1) and earlier (Movable Type for AWS 7), Movable Type 6.5.3 and earlier (Movable Type 6.5), Movable Type Advanced 6.5.3 and earlier (Movable Type Advanced 6.5), Movable Type 6.3.11 and earlier (Movable Type 6.3), Movable Type Advanced 6.3.11 and earlier (Movable Type 6.3), Movable Type Premium 1.29 and earlier, and Movable Type Premium Advanced 1.29 and earlier) allow remote authenticated attackers to upload arbitrary files and execute a php script via unspecified vectors.

Affected products

• Sixapart Movable Type: up to and including 1.29; from 6.3, up to and including 6.3.11; from 6.5.0, up to and including 6.5.3; from 7.0, up to and including 7.2.1

Published 2020-05-14. Last modified 2026-06-17.