> CVE-2025-66034 [MEDIUM]

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PUBLISHED
2025-11-29 01:16
MODIFIED
2025-11-29 01:16
CVSS_SCORE V3
6.3
EPSS (Prob. Exploit)
0.55%
Top 54.9%
DATA SOURCES:
NVD 🔗 2025-11-29 CVE PROJECT 🔗 2026-01-19 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 GITHUB 🔗 2026-11-04 OSV 🔗 2026-09-20

> 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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:L
EXPLOITABILITY
1.0
IMPACT
4.7

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:L
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Local (L)
Exploit nécessite un accès local au système
AC (Complexité d'Attaque)
Attack Complexity
High (H)
Conditions spécifiques doivent être réunies pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
Required (R)
Nécessite une action utilisateur (clic lien, ouverture fichier, etc.)
S (Périmètre)
Scope
Changed (C)
Impact s'étend au-delà du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
Low (L)
Interruption partielle du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
Low
Interruption partielle du service possible

> WEAKNESSES

CWE-91

> CWE DETAILED DESCRIPTIONS

CWE-91: XML Injection - The product does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the XML before it is processed by an end system.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: RHOAI 2.25.2 - Red Hat OpenShift AI
Updated images are now available for Red Hat OpenShift AI.
Red Hat Security Advisory: RHOAI 3.3 - Red Hat OpenShift AI
Updated images are now available for Red Hat OpenShift AI.

> GITHUB SECURITY ADVISORY

GHSA-768j-98cg-p3fv MODERATE

fontTools is Vulnerable to Arbitrary File Write and XML injection in fontTools.varLib

AFFECTED PACKAGES:
PIP / fonttools
>= 4.33.0, < 4.60.2
Fixed in: 4.60.2

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

fontTools is Vulnerable to Arbitrary File Write and XML injection in fontTools.varLib

AFFECTED PACKAGES:
Unknown / Unknown
74 versions affected
ALIASES:
GHSA-768j-98cg-p3fv, PYSEC-2026-1389

> HISTORIQUE DES MODIFICATIONS

Première apparition
29/11/2025 01:16
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:58
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-91: XML Injection (aka Blind XPath Injection) - The product does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the...
Nouvelle valeur:
CWE-91: XML Injection - The product does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the XML before it is processed ...
📊 ENRICHISSEMENT 19/01/2026 17:37
CVEPROJECT
Champ modifié: CVE Project
Ancienne valeur:
Non
Nouvelle valeur:
Oui
📊 ENRICHISSEMENT 01/12/2025 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-91: XML Injection (aka Blind XPath Injection) - The product does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the...
Total des modifications: 3 Dernière mise à jour: 1 week ago

> REFERENCES

https://github.com/fonttools/fonttools/commit/a696d5ba93270d5954f98e7cab5ddca8a0...
https://github.com/fonttools/fonttools/security/advisories/GHSA-768j-98cg-p3fv
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