CVE-2025-34157 CRITICAL

CVE-2025-34157: Coolify Stored Cross-Site Scripting (XSS) in Project Name Field

Vendor Coollabs Technologies
Product Coolify
Weakness CWE-79 · XSS
Published August 27, 2025
Last update May 15, 2026

CVSS base score

9.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction
Confidentiality
Integrity

CVSS 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

What the vulnerability does

01Description

Coolify versions prior to 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 can create a project with a maliciously crafted name containing embedded JavaScript. When an administrator attempts to delete the project or its associated resource, the payload executes in the admin’s browser context. This results in full compromise of the Coolify instance, including theft of API tokens, session cookies, and access to WebSocket-based terminal sessions on managed servers.

Key dates

02Disclosure timeline

August 27, 2025 CVE published
May 15, 2026 Record updated