An issue was discovered in Craft CMS before 3.6.0. In some circumstances, a potential XSS vulnerability existed in connection with front-end forms that accepted user uploads.
https://github.com/craftcms/cms/commit/8ee85a8f03c143fa2420e7d6f311d95cae3b19ce
https://github.com/craftcms/cms/blob/develop/CHANGELOG.md#security-1
https://github.com/craftcms/cms/blob/develop/CHANGELOG.md#360---2021-01-26
Source: Mitre, NVD
Published: 2021-06-30
Updated: 2026-06-17
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 6.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.00419