Tried, Tested and Proven

Security Advisory 06 – 035 – The create entry mechanism is vulnerable to JavaScript injection

Vulnerable System:

Movable Type

Vulnerability discovery and development:

Portcullis Security Testing Services.

Credit for Discovery:

Tim Brown – Portcullis Computer Security Ltd.

Affected Systems:

All known versions of Movable Type, the vulnerability was discovered for version 3.16.


During the creation of new blog entries, it is possible for an attacker to inject JavaScript into the title, category, body, extended body and excerpt form elements which will then be executed when a user visits a number of sections of the administration interface including the list entries mechanism, the preview entry mechanism as well as the blog index and the published entry.


An attacker could use this to execute malicious code on visitors computers.


Exploit code is not required.


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