Backend XSS Vulnerability in Contao >=4.0.0 via HTML Attributes in HTML Field

Backend XSS Vulnerability in Contao >=4.0.0 via HTML Attributes in HTML Field

CVE-2021-35955 · MEDIUM Severity

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

Contao >=4.0.0 allows backend XSS via HTML attributes to an HTML field. Fixed in 4.4.56, 4.9.18, 4.11.7.

Learn more about our Web Application Penetration Testing UK.