fonttools prior 4.43.0 xml external entity reference

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in fonttools. Affected by this vulnerability is an unknown functionality. This manipulation causes xml external entity reference. This vulnerability is registered as CVE-2023-45139. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in fonttools and classified as critical. Affected by this vulnerability is an unknown functionality. The manipulation with an unknown input leads to a xml external entity reference vulnerability. The CWE definition for the vulnerability is CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 01/09/2024 as GHSA-6673-4983. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2023-45139 since 10/04/2023. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 242717 (NewStart CGSL MAIN 7.02 : fonttools Vulnerability (NS-SA-2025-0156)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.43.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (242717). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Xml external entity reference
CWE: CWE-611 / CWE-610
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 242717
Nessus Name: NewStart CGSL MAIN 7.02 : fonttools Vulnerability (NS-SA-2025-0156)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: fonttools 4.43.0
Patch: github.com

Timelineinfo

10/04/2023 🔍
01/09/2024 +97 days 🔍
01/09/2024 +0 days 🔍
07/26/2025 +564 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-6673-4983
Status: Confirmed

CVE: CVE-2023-45139 (🔍)
GCVE (CVE): GCVE-0-2023-45139
GCVE (VulDB): GCVE-100-250195

Entryinfo

Created: 01/09/2024 19:57
Updated: 07/26/2025 16:10
Changes: 01/09/2024 19:57 (37), 01/27/2024 03:00 (3), 01/27/2024 03:07 (12), 07/26/2025 16:10 (16)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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