CVE-2020-5528

Name: CVE-2020-5528
Creator: NVD / NIST
Published: 2020-02-06T10:15:11.57+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.84%

Last modified Jun 17, 2026

CVE-2020-5528 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Cross-site scripting vulnerability in Movable Type series (Movable Type 7 r.4603 and earlier (Movable Type 7), Movable Type 6.5.2 and earlier (Movable Type 6.5), Movable Type Advanced 7 r.4603 and earlier (Movable Type Advanced 7), Movable Type Advanced 6.5.2 and earlier (Movable Type Advanced 6.5), Movable Type Premium 1.26 and earlier (Movable Type Premium), and Movable Type Premium Advanced 1.26 and earlier (Movable Type Premium Advanced)) allows remote attackers to inject arbitrary web script or HTML in the block editor and the rich text editor via a specially crafted URL.. EPSS estimates a 0.84% chance of exploitation in the next 30 days.

Description

Cross-site scripting vulnerability in Movable Type series (Movable Type 7 r.4603 and earlier (Movable Type 7), Movable Type 6.5.2 and earlier (Movable Type 6.5), Movable Type Advanced 7 r.4603 and earlier (Movable Type Advanced 7), Movable Type Advanced 6.5.2 and earlier (Movable Type Advanced 6.5), Movable Type Premium 1.26 and earlier (Movable Type Premium), and Movable Type Premium Advanced 1.26 and earlier (Movable Type Premium Advanced)) allows remote attackers to inject arbitrary web script or HTML in the block editor and the rich text editor via a specially crafted URL.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.84%

53.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Sixapart	Movable Type	>= 6.5.0, <= 6.5.2
Sixapart	Movable Type	>= 7.0, <= 7.1.4
Sixapart	Movable Type	<= 1.26

References

http://jvn.jp/en/jp/JVN94435544/index.htmlThird Party Advisory
https://movabletype.org/news/2020/02/movable_type_r4605_v720_v653_and_v6311_released.htmlThird Party Advisory
http://jvn.jp/en/jp/JVN94435544/index.htmlThird Party Advisory
https://movabletype.org/news/2020/02/movable_type_r4605_v720_v653_and_v6311_released.htmlThird Party Advisory

Timeline

Published: Feb 6, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-5528?

How severe is CVE-2020-5528?

CVE-2020-5528 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.84% probability of exploitation in the next 30 days.

How do I fix CVE-2020-5528?

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-2020-5528?

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

Scan your code now

Source: NVD / NIST