CVE-2025-66034

MEDIUM

fontTools <4.60.2 - RCE

Title source: llm

Description

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.

Exploits (9)

nomisec WORKING POC 2 stars
by v3cn4x00 · poc
https://github.com/v3cn4x00/POC-CVE-2025-66034
nomisec WRITEUP
by V0idW1re · poc
https://github.com/V0idW1re/HTB-VariaType-Writeup
nomisec WORKING POC
by jwsly12 · poc
https://github.com/jwsly12/CVE-2025-66034-htb-ctf
nomisec WORKING POC
by 4nuxd · poc
https://github.com/4nuxd/CVE-2025-66034
nomisec WORKING POC
by d0x-awrqxavc · poc
https://github.com/d0x-awrqxavc/CVE-2025-66034
nomisec WORKING POC
by tristanqtn · poc
https://github.com/tristanqtn/CVE-2025-66034
nomisec WORKING POC
by Liquid1998 · poc
https://github.com/Liquid1998/Variatype.htb-CVE-2025-66034

Scores

CVSS v3 6.3
EPSS 0.0012
EPSS Percentile 31.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:L

Details

CWE
CWE-91
Status published
Products (2)
fonttools/fonttools 4.33.0 - 4.60.2
pypi/fonttools 4.33.0 - 4.60.2PyPI
Published Nov 29, 2025
Tracked Since Feb 18, 2026