WordPress Vulnerabilities
WordPress 5.4 to 5.8 - Authenticated XSS in Block Editor
Description
On September 9, 2021 WordPress version 5.8.1 was released fixing three vulnerabilities.
The official blog post states:
"Props to Michał Bentkowski of Securitum for reporting a XSS vulnerability in the block editor."
Further details:
The issue allows an authenticated but low-privileged user (like contributor/author) to execute XSS in the editor. This bypasses the restrictions imposed on users who do not have the permission to post unfiltered_html.
Affects WordPress
Fixed in WordPress 5.8.1
Fixed in WordPress 5.7.3
Fixed in WordPress 5.7.3
Fixed in WordPress 5.7.3
Fixed in WordPress 5.6.5
Fixed in WordPress 5.6.5
Fixed in WordPress 5.6.5
Fixed in WordPress 5.6.5
Fixed in WordPress 5.6.5
Fixed in WordPress 5.5.6
Fixed in WordPress 5.5.6
Fixed in WordPress 5.5.6
Fixed in WordPress 5.5.6
Fixed in WordPress 5.5.6
Fixed in WordPress 5.5.6
Fixed in WordPress 5.4.7
Fixed in WordPress 5.4.7
Fixed in WordPress 5.4.7
Fixed in WordPress 5.4.7
Fixed in WordPress 5.4.7
Fixed in WordPress 5.4.7
Fixed in WordPress 5.4.7 References
Classification
Type
XSS
OWASP top 10
CWE
CVSS
Miscellaneous
Original Researcher
Michał Bentkowski of Securitum
Verified
No
WPVDB ID
Timeline
Publicly Published
2021-09-09 (about 4 years ago)
Added
2021-09-09 (about 4 years ago)
Last Updated
2022-05-19 (about 3 years ago)
WPScan 