What is the CVSS score of CVE-2025-66034?

CVE-2025-66034 has a CVSS 3.1 base score of 6.3 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:L. EPSS exploitation probability: 0.1%.

Which versions of Python are affected by CVE-2025-66034?

Organizations using Python. In should be aware of moderate risk from CVE-2025-66034 rated CVSS 6.3. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for CVE-2025-66034?

Yes, a public proof-of-concept exploit is available for CVE-2025-66034. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-66034?

Within 30 days: Identify affected systems running Python. In and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Python CVE-2025-66034

MEDIUM

XML Injection (aka Blind XPath Injection) (CWE-91)

2025-11-29 security-advisories@github.com

RCE Python Red Hat Suse Fonttools

6.3

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.3 MEDIUM

AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:L

SUSE

MEDIUM

qualitative

Red Hat

6.3 MEDIUM

qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

None

Integrity

High

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:24 vuln.today

Patch released

Mar 28, 2026 - 19:24 nvd

Patch available

PoC Detected

Dec 03, 2025 - 21:50 vuln.today

Public exploit code

CVE Published

Nov 29, 2025 - 01:16 nvd

MEDIUM 6.3

DescriptionGitHub Advisory

fontTools is a library for manipulating fonts, written in Python. In versions from 4.33.0 to before 4.60.2, the fonttools varLib (or python3 -m fontTools.varLib) script has an arbitrary file write vulnerability that leads to remote code execution when a malicious .designspace file is processed. The vulnerability affects the main() code path of fontTools.varLib, used by the fonttools varLib CLI and any code that invokes fontTools.varLib.main(). This issue has been patched in version 4.60.2.

AnalysisAI

fontTools is a library for manipulating fonts, written in Python. Rated medium severity (CVSS 6.3), this vulnerability is no authentication required. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-91. fontTools is a library for manipulating fonts, written in Python. In versions from 4.33.0 to before 4.60.2, the fonttools varLib (or python3 -m fontTools.varLib) script has an arbitrary file write vulnerability that leads to remote code execution when a malicious .designspace file is processed. The vulnerability affects the main() code path of fontTools.varLib, used by the fonttools varLib CLI and any code that invokes fontTools.varLib.main(). This issue has been patched in version 4.60.2. Affected products include: Fonttools. Version information: before 4.60.2.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Vendor StatusVendor

SUSE

Severity: Medium

Product	Status
Container suse/sl-micro/6.1/baremetal-os-container:2.2.1-7.2 Image SL-Micro-Azure Image SL-Micro-BYOS-Azure Image SL-Micro-BYOS-EC2 Image SL-Micro-BYOS-GCE Image SL-Micro-EC2 Image SUSE-Multi-Linux-Manager-Proxy-BYOS-Azure Image SUSE-Multi-Linux-Manager-Proxy-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Proxy-BYOS-GCE Image SUSE-Multi-Linux-Manager-Server-Azure-llc Image SUSE-Multi-Linux-Manager-Server-Azure-ltd Image SUSE-Multi-Linux-Manager-Server-BYOS-Azure Image SUSE-Multi-Linux-Manager-Server-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Server-BYOS-GCE Image SUSE-Multi-Linux-Manager-Server-EC2-llc Image SUSE-Multi-Linux-Manager-Server-EC2-ltd	Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7	Fixed
SUSE Linux Enterprise Server 16.0 SUSE Linux Enterprise Server for SAP applications 16.0	Fixed
openSUSE Leap 15.6	Fixed
openSUSE Leap 16.0	Fixed

CVE-2025-66034 vulnerability details – vuln.today

Back

openSUSE Tumbleweed	Fixed
SUSE Linux Enterprise Server 16.0	Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7	Fixed
SUSE Linux Enterprise Server 16.0	Fixed
SUSE Linux Enterprise Server 16.1	Fixed
SUSE Linux Enterprise Server for SAP applications 16.0	Fixed
SUSE Linux Enterprise Server for SAP applications 16.1	Fixed
openSUSE Leap 15.6	Fixed
SUSE Linux Enterprise Module for Package Hub 15 SP6	Fixed

Python CVE-2025-66034

Severity by source

CVSS VectorGitHub Advisory

Lifecycle Timeline

DescriptionGitHub Advisory

AnalysisAI

Technical ContextAI

RemediationAI

More in Python

Same weakness CWE-91 – XML Injection (aka Blind XPath Injection)

Same technique RCE

Vendor StatusVendor

SUSE

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External POC / Exploit Code