lib/MT/Upgrade.pm in mt-upgrade.cgi in Movable Type 4.2x and 4.3x through 4.38 does not require authentication for requests to database-migration functions, which allows remote attackers to conduct eval injection and SQL injection attacks via crafted parameters, as demonstrated by an eval injection attack against the core_drop_meta_for_table function, leading to execution of arbitrary Perl code.

Cross-site scripting (XSS) vulnerability in Movable Type 4.x before 4.36 and 5.x before 5.05 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Unspecified vulnerability in Movable Type 4.x before 4.36 and 5.x before 5.05 allows remote attackers to read or modify data via unknown vectors.

Movable Type before 4.38, 5.0x before 5.07, and 5.1x before 5.13 allows remote attackers to take control of sessions via unspecified vectors related to the (1) commenting feature and (2) community script.

Multiple cross-site request forgery (CSRF) vulnerabilities in Movable Type before 4.38, 5.0x before 5.07, and 5.1x before 5.13 allow remote attackers to hijack the authentication of arbitrary users for requests that modify data via the (1) commenting feature or (2) community script.

SQL injection vulnerability in Movable Type 4.x before 4.35 and 5.x before 5.04 allows remote attackers to execute arbitrary SQL commands via unspecified vectors.

Multiple unspecified vulnerabilities in Movable Type 4.x before 4.35 and 5.x before 5.04 have unknown impact and attack vectors related to the (1) mt:AssetProperty and (2) mt:EntryFlag tags.

Cross-site scripting (XSS) vulnerability in Movable Type 4.x before 4.35 and 5.x before 5.04 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Unspecified vulnerability in Movable Type 4.x before 4.35 and 5.x before 5.04 has unknown impact and attack vectors related to the "dynamic publishing error message."

Multiple cross-site scripting (XSS) vulnerabilities in the administrative user interface in Six Apart Movable Type 5.0 and 5.01 allow remote attackers to inject arbitrary web script or HTML via unknown vectors.