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CVE-2025-54803— js-toml is vulnerable to Prototype Pollution

Quick assessment

Affected
sunnyadn js-toml
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

js-toml是Sunny个人开发者的一个用于JavaScript的TOML解析器。 js-toml 1.0.2之前版本存在安全漏洞，该漏洞源于原型污染漏洞，可能导致全局Object.prototype属性被修改。

AI Predicted 7.4 Difficulty: Easy EPSS 0.50% · P40
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I. Basic Information for CVE-2025-54803

Vulnerability Information
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Vulnerability Title
js-toml is vulnerable to Prototype Pollution
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5
Vulnerability Title
js-toml 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
js-toml是Sunny个人开发者的一个用于JavaScript的TOML解析器。 js-toml 1.0.2之前版本存在安全漏洞，该漏洞源于原型污染漏洞，可能导致全局Object.prototype属性被修改。
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
sunnyadn js-toml < 1.0.2 -

II. Public POCs for CVE-2025-54803

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III. Intelligence Information for CVE-2025-54803

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Vendor Advisories for CVE-2025-54803 (1)

IV. Related Vulnerabilities

Same product: js-toml
Same vendor: sunnyadn
Same weakness: CWE-1321

V. Comments for CVE-2025-54803

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