# CVE-2026-33088: Six Apart Movable Type SQL injection in Listing Framework

Source: https://junglewise.ai/threats/cve-2026-33088-six-apart-movable-type-sql-injection-in-listing-framework  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-08. Updated: 2026-07-25  
License: CC BY 4.0 with a link back

CVE-2026-33088 · Severity: critical · CVSS 9.8 · Published 2026-04-08

Movable Type, a popular content management system (CMS), contains a critical security vulnerability in its core framework. An attacker can use this flaw to run unauthorized database commands, which could lead to the theft of sensitive information, modification of website content, or full administrative takeover. Organizations using this software should update to the latest version immediately or restrict access to the administrative console and Data API.

## Quick answers

**Is CVE-2026-33088 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-33088 being exploited in the wild.

**How severe is CVE-2026-33088?** Critical severity, with a CVSS score of 9.8, published 8 April 2026.

**Which products and versions are affected?** Six Apart Movable Type Advanced 9.1.0 and earlier, 9.0.6 and earlier, 8.8.2 and earlier, 8.0.9 and earlier, 5.1 to 8.4.4; Six Apart Movable Type Premium Advanced Edition 9.1.0 and earlier, 9.0.6 and earlier, 2.14 and earlier.

**Is there a fix for CVE-2026-33088?** A patch was published on 2026-04-08. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-33088 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-33088?** Check whether you run Six Apart Movable Type Advanced or Six Apart Movable Type Premium Advanced Edition at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An SQL injection vulnerability exists in the Listing Framework of Movable Type, which is utilized by both the Admin Panel (mt.cgi) and the Data API (mt-data-api.cgi). The flaw resides in the request processing logic, where insufficient sanitization of input allows a remote, unauthenticated attacker to inject and execute arbitrary SQL commands. This can lead to unauthorized data retrieval, modification, or deletion within the backend database. The vulnerability affects a wide range of versions, including legacy end-of-life releases. Patches are available in versions 9.1.1, 9.0.7, 8.8.3, and 8.0.10. Temporary mitigations include disabling the Data API or restricting access to administrative scripts via IP whitelisting.

## Affected products

- Six Apart Ltd. Movable Type 9.1.0 and earlier, 9.0.6 and earlier, 8.8.2 and earlier, 8.0.9 and earlier, 5.1 to 8.4.4
- Six Apart Ltd. Movable Type Advanced 9.1.0 and earlier, 9.0.6 and earlier, 8.8.2 and earlier, 8.0.9 and earlier, 5.1 to 8.4.4
- Six Apart Ltd. Movable Type Premium 9.1.0 and earlier, 9.0.6 and earlier, 2.14 and earlier, 1.0 to 1.68
- Six Apart Ltd. Movable Type Premium Advanced Edition 9.1.0 and earlier, 9.0.6 and earlier, 2.14 and earlier

## Timeline

- 2026-04-08: disclosed
- 2026-04-08: patched
- 2026-04-08: advisory

## References

- [https://jvn.jp/en/jp/JVN66473735/](https://jvn.jp/en/jp/JVN66473735/)
- [https://movabletype.org/news/2026/04/mt-907-released.html](https://movabletype.org/news/2026/04/mt-907-released.html)
- [https://www.sixapart.jp/movabletype/news/2026/04/08-1100.html](https://www.sixapart.jp/movabletype/news/2026/04/08-1100.html)

## Related threats

- [Six Apart Movable Type SQL injection in XML-RPC interface](https://junglewise.ai/threats/cve-2016-5742-six-apart-movable-type-sql-injection-in-xml-rpc-interface)