CVE-2019-16780 Information

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. This has been patched in WordPress 5.3.1 along with all the previous WordPress versions from 3.7 to 5.3 via a minor release. Automatic updates are enabled by default for minor releases and we strongly recommend that you keep them enabled.

CVSS Vector

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

Reference

https://github.com/WordPress/wordpress-develop/commit/505dd6a20b6fc3d06130018c1caeff764248c29e https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-x3wp-h3qx-9w94 https://hackerone.com/reports/738644 https://seclists.org/bugtraq/2020/Jan/8 https://wordpress.org/news/2019/12/wordpress-5-3-1-security-and-maintenance-release/ https://wpvulndb.com/vulnerabilities/9976 https://www.debian.org/security/2020/dsa-4599 https://www.debian.org/security/2020/dsa-4677

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

5.4