CVE-2025-34157

CRITICAL 1 PoC
INFO Priority: 0.05 BB Relevance: 69/100
Published: 2025-08-27 Modified: 2026-11-08 First seen: 2026-11-08 Status: active

Attack Surface

Network Low Complexity Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: Passive
AT: None
VC: High
VI: High
VA: High

Description

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.

Affected Software (1)

VendorProductVersion
coolLabs Technologies Coolify 0 < 4.0.0.-beta.420.7

References & Advisories (3)

https://github.com/Eyodav/CVE-2025-34157
technical-description exploit

Proof of Concept (1)

Bug Bounty Relevance

69 / 100
✓ Network accessible
✓ Low complexity
✓ PoC available (1)

CVSS Score

9.4 / 10.0 v4.0
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

EPSS — Exploitation Probability

0.48%
Raw Score 0.004810
Percentile 42.0%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00481
2026-11-12
0.00481
2026-11-10
0.00481
2026-11-09
0.00481
2026-11-08
0.00481

Intelligence Sources

mitre ref →