CVE-2026-237045.1MediumCWE-434

CVE-2026-23704: Six Apart Ltd. Movable Type (Software Edition) vulnerability

Six Apart Ltd. · Movable Type (Software Edition)

Affected: Six Apart Ltd. Movable Type (Software Edition) · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.2%probability of exploitation in the next 30 days

13th percentile

050100

Higher than 13% of scored CVEs

5.1MediumCVSS 4.0

LowMediumHighCrit.

DescriptionCVE.org

A non-administrative user can upload malicious files. When an administrator or the product accesses that file, an arbitrary script may be executed on the administrator's browser. Note that Movable Type 7 series and 8.4 series, which are End-of-Life (EOL), are affected by the vulnerability as well.

Affected products6

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Six Apart Ltd. · Movable Type (Software Edition)9.0.4 to 9.0.5 (9.0 series); 8.8.0 to 8.8.1 (8.8 series); 8.0.2 to 8.0.8 (8.0 series)
Six Apart Ltd. · Movable Type Advanced (Software Edition)9.0.4 to 9.0.5 (9.0 series); 8.8.0 to 8.8.1 (8.8 series); 8.0.2 to 8.0.8 (8.0 series)
Six Apart Ltd. · Movable Type Premium (Software Edition)9.0.4 (MTP 9.0 series); 2.13 and earlier (MTP 2 series)
Six Apart Ltd. · Movable Type Premium (Advanced Edition) (Software Edition)9.0.4 (MTP 9.0 series); 2.13 and earlier (MTP 2 series)
Six Apart Ltd. · Movable Type (Cloud Edition)9.0.5 (9 series); 8.8.1 (8 series)
Six Apart Ltd. · Movable Type Premium (Cloud Edition)9.0.5 (9 series); 2.12 (MTP 2 series)

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Unrestricted File Upload · File and Path Handling
Vendor: Six Apart Ltd.
Published: February 2026
Band: Unlikely (under 1%), February 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-23704 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.