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WordPress Vulnerabilities

WordPress <= 5.3 - Authenticated Stored XSS via Block Editor Content

Description

WordPress users with lower privileges (like contributors) can inject JavaScript code in the block editor using a specific payload, which is executed within the dashboard. This can lead to XSS if an admin opens the post in the editor. Execution of this attack does require an authenticated user.

Affects WordPress

3.8.1
Fixed in version 3.8.32
3.8
Fixed in version 3.8.32
3.7.1
Fixed in version 3.7.32
3.9
Fixed in version 3.9.30
3.9.1
Fixed in version 3.9.30
3.7
Fixed in version 3.7.32
3.8.2
Fixed in version 3.8.32
3.8.3
Fixed in version 3.8.32
3.9.2
Fixed in version 3.9.30
4.0
Fixed in version 4.0.29

References

CVE
CVE-2019-16781
CVE
CVE-2019-16780
URL
https://wordpress.org/news/2019/12/wordpress-5-3-1-security-and-maintenance-release/
URL
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-pg4x-64rh-3c9v

Classification

Type

XSS

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

Miscellaneous

Original Researcher

Nguyen The Duc

Submitter

ducnt

Submitter website
http://www.ducnt.net/
Submitter twitter
https://twitter.com/ducnt_
Verified

No

WPVDB ID
be794159-4486-4ae1-a5cc-5c190e5ddf5f

Timeline

Publicly Published

2019-12-13 (about 3 years ago)

Added

2019-12-13 (about 3 years ago)

Last Updated

2020-05-01 (about 2 years ago)

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