sunnyadn js-toml up to 1.0.1 prototype pollution

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

Summaryinfo

A vulnerability was found in sunnyadn js-toml up to 1.0.1. It has been declared as critical. This affects an unknown function. The manipulation results in prototype pollution. This vulnerability is cataloged as CVE-2025-54803. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in sunnyadn js-toml up to 1.0.1. Affected is some unknown processing. The manipulation with an unknown input leads to a prototype pollution vulnerability. CWE is classifying the issue as CWE-1321. The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

js-toml is a TOML parser for JavaScript, fully compliant with the TOML 1.0.0 Spec. In versions below 1.0.2, a prototype pollution vulnerability in js-toml allows a remote attacker to add or modify properties of the global Object.prototype by parsing a maliciously crafted TOML input. This is fixed in version 1.0.2.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2025-54803 since 07/29/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.

Upgrading to version 1.0.2 eliminates this vulnerability. Applying the patch b125910a3f094b744c9c3571360d4b9e3a472f66 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

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: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Prototype pollution
CWE: CWE-1321 / CWE-94 / CWE-74
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: js-toml 1.0.2
Patch: b125910a3f094b744c9c3571360d4b9e3a472f66

Timelineinfo

07/29/2025 CVE reserved
08/05/2025 +7 days Advisory disclosed
08/05/2025 +0 days VulDB entry created
10/10/2025 +65 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-65fc-cr5f-v7r2
Status: Confirmed

CVE: CVE-2025-54803 (🔒)
GCVE (CVE): GCVE-0-2025-54803
GCVE (VulDB): GCVE-100-318744

Entryinfo

Created: 08/05/2025 09:09
Updated: 10/10/2025 01:27
Changes: 08/05/2025 09:09 (68), 08/05/2025 13:29 (1), 10/10/2025 01:27 (11)
Complete: 🔍
Cache ID: 216::103

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