
A stored XSS in the project delete flow allows execution of attacker-controlled JavaScript in an administrator’s browser when the admin attempts to delete a project created by a low-privileged user. This can lead to takeover of the Coolify instance (cookies, API tokens, WebSocket/terminal actions)
Affects: Coolify ≤ v4.0.0-beta.420.6
Fixed in: v4.0.0-beta.420.7
Severity: Critical (9.4)
CVSS 4.0 Vector:CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CWE: CWE-79 (Cross-Site Scripting), CWE-20 (Improper Input Validation)
A stored XSS in the project delete flow allows execution of attacker-controlled JavaScript in an administrator’s browser when the admin attempts to delete a project created by a low-privileged user. This can lead to takeover of the Coolify instance (cookies, API tokens, WebSocket/terminal actions).
v4.0.0-beta.420.6.Steps and payloads are in /POC.