Unrestricted File Upload exists in BigTree CMS through 4.2.18: if an attacker uploads an 'xxx.pht' or 'xxx.phtml' file, they could bypass a safety check and execute any code.
Severity
CVSS 3.0
9.8 critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
1.3% chance of exploitation in the next 30 days; higher than 69% of CVEs (scores of 2026-10-31)