Unrestricted file upload in Six Apart Ltd. Movable Type
Priority MEDIUM 42CWE-434Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-434.
Summary
Movable Type series (Movable Type 7 r.4606 (7.2.1) and earlier (Movable Type 7), Movable Type Advanced 7 r.4606 (7.2.1) and earlier (Movable Type Advanced 7), Movable Type for AWS 7 r.4606 (7.2.1) and earlier (Movable Type for AWS 7), Movable Type 6.5.3 and earlier (Movable Type 6.5), Movable Type Advanced 6.5.3 and earlier (Movable Type Advanced 6.5), Movable Type 6.3.11 and earlier (Movable Type 6.3), Movable Type Advanced 6.3.11 and earlier (Movable Type 6.3), Movable Type Premium 1.29 and earlier, and Movable Type Premium Advanced 1.29 and earlier) allow remote authenticated attackers to upload arbitrary files and execute a php script via unspecified vectors.
Why it matters now
EPSS 0.01733 77th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Six Apart Ltd. | Movable Type | Movable Type 7 r.4606 (7.2.1) and earlier (Movable Type 7), Movable Type Advanced 7 r.4606 (7.2.1) and earlier (Movable Type Advanced 7), Movable Type for AWS 7 r.4606 (7.2.1) and earlier (Movable Type for AWS 7), Movable Type 6.5.3 and earlier (Movable Type 6.5), Movable Type Advanced 6.5.3 and earlier (Movable Type Advanced 6.5), Movable Type 6.3.11 and earlier (Movable Type 6.3), Movable Type Advanced 6.3.11 and earlier (Movable Type 6.3), Movable Type Premium 1.29 and earlier, and Movable Type Premium Advanced 1.29 and earlier | — | No fix listed | CNA |
- Movable Type VendorSix Apart Ltd. Affected Movable Type 7 r.4606 (7.2.1) and earlier (Movable Type 7), Movable Type Advanced 7 r.4606 (7.2.1) and earlier (Movable Type Advanced 7), Movable Type for AWS 7 r.4606 (7.2.1) and earlier (Movable Type for AWS 7), Movable Type 6.5.3 and earlier (Movable Type 6.5), Movable Type Advanced 6.5.3 and earlier (Movable Type Advanced 6.5), Movable Type 6.3.11 and earlier (Movable Type 6.3), Movable Type Advanced 6.3.11 and earlier (Movable Type 6.3), Movable Type Premium 1.29 and earlier, and Movable Type Premium Advanced 1.29 and earlier Fixed in — No fix listed CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:*:*:* | up to 1.29 | Vulnerable | Sixapart |
| cpe:2.3:a:sixapart:movable_type:*:*:*:*:premium:*:*:* | up to 1.29 | Vulnerable | Sixapart |
| cpe:2.3:a:sixapart:movable_type:*:*:*:*:-:*:*:* | 6.3 – 6.3.11 | Vulnerable | Sixapart |
| cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:*:*:* | 6.3 – 6.3.11 | Vulnerable | Sixapart |
| cpe:2.3:a:sixapart:movable_type:*:*:*:*:-:*:*:* | 6.5.0 – 6.5.3 | Vulnerable | Sixapart |
| cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:*:*:* | 6.5.0 – 6.5.3 | Vulnerable | Sixapart |
| cpe:2.3:a:sixapart:movable_type:*:*:*:*:*:aws:*:* | 7.0 – 7.2.1 | Vulnerable | Sixapart |
| cpe:2.3:a:sixapart:movable_type:*:*:*:*:-:*:*:* | 7.0 – 7.2.1 | Vulnerable | Sixapart |
| cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:*:*:* | 7.0 – 7.2.1 | Vulnerable | Sixapart |
- cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:*:*:* Versions up to 1.29 Vulnerable ·Sixapart
- cpe:2.3:a:sixapart:movable_type:*:*:*:*:premium:*:*:* Versions up to 1.29 Vulnerable ·Sixapart
- cpe:2.3:a:sixapart:movable_type:*:*:*:*:-:*:*:* Versions 6.3 – 6.3.11 Vulnerable ·Sixapart
- cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:*:*:* Versions 6.3 – 6.3.11 Vulnerable ·Sixapart
- cpe:2.3:a:sixapart:movable_type:*:*:*:*:-:*:*:* Versions 6.5.0 – 6.5.3 Vulnerable ·Sixapart
- cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:*:*:* Versions 6.5.0 – 6.5.3 Vulnerable ·Sixapart
- cpe:2.3:a:sixapart:movable_type:*:*:*:*:*:aws:*:* Versions 7.0 – 7.2.1 Vulnerable ·Sixapart
- cpe:2.3:a:sixapart:movable_type:*:*:*:*:-:*:*:* Versions 7.0 – 7.2.1 Vulnerable ·Sixapart
- cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:*:*:* Versions 7.0 – 7.2.1 Vulnerable ·Sixapart
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-5577
- 2026-10-03 Alias added: GHSA-qq4g-m927-9x4x
References
More Six Apart Ltd. vulnerabilities
- TI-2021-04052 OS command injection in Six Apart Ltd. Movable Type CVSS 3.1CRITICAL 9.8
- TI-2026-20843 Code injection in Six Apart Ltd. Movable Type CVSS 4.0CRITICAL 9.3
- TI-2026-69104 Code injection in Movable Type upgrade script CVSS 4.0CRITICAL 9.3
- TI-2022-17791 Code injection in Six Apart Ltd. Movable Type XMLRPC API CVSS 3.1CRITICAL 9.8
- TI-2026-69105 SQL injection in Movable Type Site Search function CVSS 4.0HIGH 8.8
- TI-2020-04546 Cross-site request forgery in Six Apart Ltd. Movable Type CVSS 3.1HIGH 8.8
Sources
- CVE-2020-5577 · CVE Program
- CVE-2020-5577 · NVD
- FIRST EPSS
- GHSA-qq4g-m927-9x4x · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences