XSS in Coollabs Coolify
CVE-2025-59158
Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Coolify versions prior to and including v4.0.0-beta.420.6 are vulnerable to a stored cross-site scripting (XSS) attack in the project creation workflow. An authenticated user with low privileges (e.g., member role) can create a project with a maliciously crafted name containing embedded JavaScript. When an administrator later attempts to delete the project or its associated resource, the payload automatically executes in the admin’s browser context. Version 4.0.0-beta.420.7 contains a patch for the issue.
EPSS: 0.005 (40.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Coollabs Coolify — versions 4.0.0
- Coollabsio Coolify — versions < 4.0.0-beta.420.7
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-59158?
- CVE-2025-59158 is a high-severity vulnerability in Coollabs Coolify, classified under Improper Encoding or Escaping of Output. CVSS score: 8.0/10. Published 2026-01-05.
- How severe is CVE-2025-59158?
- High severity. CVSS v3 base score is 8.0 out of 10.