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CVE-2023-45139— fonttools XML External Entity Injection (XXE) Vulnerability

Quick assessment

Affected
fonttools fonttools
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

fontTools是一个用 Python 编写的用于操作字体的库。 fontTools 4.43.0之前版本存在代码问题漏洞。攻击者利用该漏洞可以运行 fontTools 的文件系统的任意文件。

CVSS 7.5 · High EPSS 1.24% · P68
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I. Basic Information for CVE-2023-45139

Vulnerability Information
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Vulnerability Title
fonttools XML External Entity Injection (XXE) Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
fontTools is a library for manipulating fonts, written in Python. The subsetting module has a XML External Entity Injection (XXE) vulnerability which allows an attacker to resolve arbitrary entities when a candidate font (OT-SVG fonts), which contains a SVG table, is parsed. This allows attackers to include arbitrary files from the filesystem fontTools is running on or make web requests from the host system. This vulnerability has been patched in version 4.43.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
XML外部实体引用的不恰当限制(XXE)
Source: CVE Program / CVE List V5
Vulnerability Title
fontTools 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
fontTools是一个用 Python 编写的用于操作字体的库。 fontTools 4.43.0之前版本存在代码问题漏洞。攻击者利用该漏洞可以运行 fontTools 的文件系统的任意文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
fonttools fonttools >= 4.28.2, < 4.43.0 -

II. Public POCs for CVE-2023-45139

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7003 chars
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III. Intelligence Information for CVE-2023-45139

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Patches & Fixes for CVE-2023-45139 (1)

Vendor Advisories for CVE-2023-45139 (1)

Mailing List Discussions for CVE-2023-45139 (3)

Other References for CVE-2023-45139 (1)

IV. Related Vulnerabilities

Same product: fonttools
Same vendor: fonttools
Same weakness: CWE-611

V. Comments for CVE-2023-45139

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