XSS in Wordpress

CVE-2019-16781

In WordPress before 5.3.1, authenticated users with lower privileges (like contributors) can inject JavaScript code in the block editor, which is executed within the dashboard. It can lead to an admin opening the affected post in the editor leading to XSS.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.014 (69.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-16781?
CVE-2019-16781 is a medium-severity vulnerability in Wordpress, classified under Cross-site Scripting. CVSS score: 5.8/10. Published 2019-12-26.
How severe is CVE-2019-16781?
Medium severity. CVSS v3 base score is 5.8 out of 10.
Is CVE-2019-16781 known to be exploited?
9 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.