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OpenAdvisories
Medium · 4.8 CVE-2025-54856 EUVD-2025-35656GHSA-4wvq-85hg-6256

Movable Type contains a stored cross-site scripting vulnerability in Edit ContentData page. If crafted input is stored by an attacker with …

Published Oct 23, 2025 · Updated Oct 23, 2025 · Assigned by jpcert

Description

Movable Type contains a stored cross-site scripting vulnerability in Edit ContentData page. If crafted input is stored by an attacker with "ContentType Management" privilege, an arbitrary script may be executed on the web browser of the user who accesses Edit ContentData page.

Affected products

VendorProductAffectedFixed
Six Apart Movable Type (Software Edition) 8.4.0 to 8.4.3 (8.4 series), 8.0.0 to 8.0.7 (8.0 series), 7 r.5509 and earlier (7 series) —
Six Apart Movable Type Advanced (Software Edition) 8.4.0 to 8.4.3 (8.4 series), 8.0.0 to 8.0.7 (8.0 series), 7 r.5509 and earlier (7 series) —
Six Apart Movable Type Premium (Software Edition) 2.10 and earlier (2 series), 1.67 and earlier (1 series) —
Six Apart Movable Type Premium (Advanced Edition) (Software Edition) 2.10 and earlier (2 series), 1.67 and earlier (1 series) —
Six Apart Movable Type (Cloud Edition) 8.7.0 (8 series), 7 r.5509 (7 series) —
Six Apart Movable Type Premium (Cloud Edition) 2.10 (2 series), 1.67 (1 series) —

References