POC-CVE-2025-66034

fontvarlib.py — CVE-2025-66034 fontTools varLib — Arbitrary File Write + XML Injection → Remote Code Execution Table of Contents Overview Vulnerability Details Attack Chain Requirements Installation Configuration Usage How It Works Vulnerable Code Pre-Exploitation Checklist...

varlib-cve-2025-66034

fontTools varLib CVE-2025-66034 Exploit This repo doesn't introduce a new vulnerability. This is a Proof-of-concept exploit for CVE-2025-66034 affecting the fontTools varLib variable font generation pipeline. The vulnerability allows attackers to control the output filename inside a crafted...

CVE-2025-66034

CVE-2025-66034 — fontTools varLib Arbitrary File Write → RCE PoC exploit for an Arbitrary File Write + XML Injection vulnerability infontTools.varLib Tested on HackTheBox — VarIaType Vulnerability fontTools.varLib processes .designspace XML files to build variable fonts. Two weaknesses combine to...

CVE-2025-66034

CVE-2025-66034 affects fontTools, a Python font manipulation library. Affected: fontTools.varLib main() path when processing malicious .designspace files; arbitrary file write can lead to remote code execution. Impact: high (per CVSS 3.1, base 9.8) when exploited via the varLib CLI or code invoki...