CVE-2025-34157: Coolify versions prior to v4.0.0-beta.420.6 are vulnerable to a stored cross-site scripting (XSS) attack in th

Q: How do I fix CVE-2025-34157?

coolify: upgrade to 4.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2025-34157 being exploited?

CVE-2025-34157 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-34157 affect?

CVE-2025-34157 affects coolify. Severity is critical (CVSS 9.0). 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 contai

Q: How urgent is CVE-2025-34157?

Priority 42/100. Critical severity

This month

CRITICAL 9.0UPGRADE

CVE-2025-34157 is a critical-severity flaw (CVSS 9.0) affecting coolify. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 ins

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-20, CWE-79
Published	2025-08-27
Last modified	2026-07-14

Publisher (CNA): VulnCheck · Vendor: coollabs

Last updated 2026-07-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-08-27 17:15 UTCPublished CVE record published
2026-07-14 23:17 UTCUpdated Record last modified

coollabs coolify UPGRADE

Affected: < 4.0.0 · 4.0.0 beta100 · 4.0.0 beta101 · 4.0.0 beta102 · 4.0.0 beta103 · 4.0.0 beta104 · 4.0.0 beta105 · 4.0.0 beta106

Fixed in: 4.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy coolify || rpm -q coolify || coolify --version

2. UPGRADE to 4.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade coolify

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade coolify

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-34157?

coolify: upgrade to 4.0.0. Exact commands for each OS are on this page.

Is CVE-2025-34157 being exploited?

CVE-2025-34157 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-34157 affect?

CVE-2025-34157 affects coolify. Severity is critical (CVSS 9.0). 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 contai

How urgent is CVE-2025-34157?

Priority 42/100. Critical severity

Related CVEs

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CVE-2025-66213 HIGH 8.8 UPGRADE Coolify is an open-source and self-hostable tool for managing servers, applications, and databases
CVE-2025-66210 HIGH 8.8 UPGRADE Coolify is an open-source and self-hostable tool for managing servers, applications, and databases
CVE-2025-66211 HIGH 8.8 UPGRADE Coolify is an open-source and self-hostable tool for managing servers, applications, and databases

References

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