CVE-2020-5577

Name: CVE-2020-5577
Creator: NVD / NIST
Published: 2020-05-14T02:15:11.483+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.73%

Last modified Jun 17, 2026

CVE-2020-5577 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 1.73% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.73%

74.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Sixapart	Movable Type	<= 1.29
Sixapart	Movable Type	>= 6.3, <= 6.3.11
Sixapart	Movable Type	>= 6.5.0, <= 6.5.3
Sixapart	Movable Type	>= 7.0, <= 7.2.1

References

https://jvn.jp/en/jp/JVN28806943/index.htmlThird Party Advisory, VDB Entry
https://movabletype.org/news/2020/05/mt-730-660-6312-released.htmlRelease Notes, Vendor Advisory
https://jvn.jp/en/jp/JVN28806943/index.htmlThird Party Advisory, VDB Entry
https://movabletype.org/news/2020/05/mt-730-660-6312-released.htmlRelease Notes, Vendor Advisory

Timeline

Published: May 14, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-5577?

How severe is CVE-2020-5577?

CVE-2020-5577 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.73% probability of exploitation in the next 30 days.

How do I fix CVE-2020-5577?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-5577?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST