CVE-2019-16780

MEDIO 5.4CVE-2019-16780 · Published 26/12/2019 · updated 17/06/2026

Package	Affected versions	Patched versions
wordpress wordpress	`= 3.7> 3.7, < 5.3.1`	`5.3.1`

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.

References

WordPress/wordpress-develop commit 505dd6a · Patch
WordPress/wordpress-develop security advisory · Third Party Advisory
hackerone.com/reports/738644 · Permissions Required
seclists.org/bugtraq/2020/Jan/8 · Mailing List
wordpress.org/news/2019/12/wordpress-5-3-1-security-and-maintenance-release · Release Notes
wpvulndb.com/vulnerabilities/9976 · Third Party Advisory
debian.org/security/2020/dsa-4599 · Third Party Advisory
debian.org/security/2020/dsa-4677 · Third Party Advisory

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