CVE-2026-33088

Medium

Published: 08 April 2026

Published

08 April 2026

Modified

20 April 2026

KEV Added

—

Patch

—

CVSS Score v4 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Score 0.0035 26.7th percentile

Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-33088 is a medium-severity SQL Injection (CWE-89) vulnerability in Sixapart Movable Type. Its CVSS base score is 6.9 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 26.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2026-33088 is an SQL injection vulnerability (CWE-89) affecting Movable Type, a content management system provided by Six Apart Ltd. Published on 2026-04-08, the flaw enables an attacker to execute arbitrary SQL statements against the underlying database.

The vulnerability carries a CVSS v3.1 base score of 9.8 (Critical), indicating exploitation over the network (AV:N) with low complexity (AC:L), no required privileges (PR:N), and no user interaction (UI:N). An unauthenticated remote attacker can leverage this to achieve high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H), such as extracting sensitive data, modifying database contents, or disrupting service.

Advisories and patches are detailed in references including JVN at https://jvn.jp/en/jp/JVN66473735/, with Six Apart announcing the release of Movable Type 9.0.7 to remediate the issue at https://movabletype.org/news/2026/04/mt-907-released.html and https://www.sixapart.jp/movabletype/news/2026/04/08-1100.html. Security practitioners should apply the update promptly and review configurations for SQL injection protections.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-20133

Vulnerability details

Movable Type provided by Six Apart Ltd. contains an SQL Injection vulnerability which may allow an attacker to execute an arbitrary SQL statement.

CWE(s): CWE-89

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

SQL injection in public-facing CMS (Movable Type) directly matches T1190 as the exploitation vector for unauthenticated remote arbitrary SQL execution with full CIA impact.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0