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WordPress Vulnerabilities

WordPress < 5.4.2 - Authenticated XSS in Block Editor

Description

Props to Sam Thomas (jazzy2fives) for finding an XSS issue where authenticated users with low privileges are able to add JavaScript to posts in the block editor.

Affects WordPress

5.4.1
Fixed in version 5.4.2
5.4
Fixed in version 5.4.2
5.3.3
Fixed in version 5.3.4
5.3.2
Fixed in version 5.3.4
5.3.1
Fixed in version 5.3.4
5.3
Fixed in version 5.3.4
5.2.6
Fixed in version 5.2.7
5.2.5
Fixed in version 5.2.7
5.2.4
Fixed in version 5.2.7
5.2.3
Fixed in version 5.2.7

References

CVE
CVE-2020-4046
URL
https://wordpress.org/news/2020/06/wordpress-5-4-2-security-and-maintenance-release/
URL
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rpwf-hrh2-39jf
URL
https://pentest.co.uk/labs/research/subtle-stored-xss-wordpress-core/

YouTube Video

Classification

Type

XSS

OWASP top 10
A7: Cross-Site Scripting (XSS)
CWE
CWE-79

Miscellaneous

Original Researcher

Sam Thomas (jazzy2fives)

Verified

No

WPVDB ID
831e4a94-239c-4061-b66e-f5ca0dbb84fa

Timeline

Publicly Published

2020-06-10 (about 2 years ago)

Added

2020-06-11 (about 2 years ago)

Last Updated

2020-06-18 (about 2 years ago)

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