CVE-2019-16780

Stored cross-site scripting (XSS) in WordPress block editor

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.

Scores

Weaknesses (CWE)

• CWE-79

European references

• ENISA EUVD · EUVD-2019-7298
• GCVE · GCVE-0-2019-16780

Affected configurations (NVD CPE)

• cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:* > 3.7 < 5.3.1
• cpe:2.3:a:wordpress:wordpress:3.7:-:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Affected products

References

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

Sources