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Medium · 4.3 CVE-2026-44392 EUVD-2026-31066GHSA-98gq-cq48-6gcm

Missing authorization vulnerability exists in Movable Type. Under certain conditions, when a user without administrator privileges signs in…

Published May 20, 2026 · Updated May 20, 2026 · Assigned by jpcert

Description

Missing authorization vulnerability exists in Movable Type. Under certain conditions, when a user without administrator privileges signs in to the product, unintended update processing may be executed.

Affected products

VendorProductAffectedFixed
Six Apart Movable Type 9.1.1 and earlier, 9.0.7 and earlier, 8.8.3 and earlier, 8.0.10 and earlier —
Six Apart Movable Type Advanced 9.1.1 and earlie, 9.0.7 and earlier, 8.8.3 and earlier, 8.0.10 and earlier —
Six Apart Movable Type Premium 9.1.1 and earlier, 9.0.7 and earlier, 2.15 and earlier (included in Movable Type 8.8.4 and earlier or Movable Type 8.0.11 and earlier) —
Six Apart Movable Type Premium (Advanced Edition) 9.1.1 and earlier, 9.0.7 and earlier, 2.15 and earlier (included in Movable Type 8.8.4 and earlier or Movable Type 8.0.11 and earlier) —

References