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Vulnerability Intelligence

CVE-2025-54803 | Mondoo Vulnerability Intelligence

CVE-2025-54803

HIGH7.9

js-toml is vulnerable to Prototype Pollution

Published Aug 5, 2025

Modified 5 months ago

No fix available

Details

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.

References

DETECTIONhttps://gist.github.com/siunam321/f3dc4d21a5a932c67b6c11d0026f5afc WEBhttps://github.com/sunnyadn/js-toml/commit/b125910a3f094b744c9c3571360d4b9e3a472f66 WEBhttps://github.com/sunnyadn/js-toml/security/advisories/GHSA-65fc-cr5f-v7r2 ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2025-54803

CVSS Analysis

CVSS v4.0

7.9

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Attack Requirements

NoneAT:N

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Vulnerable System

Vuln. Confidentiality

NoneVC:N

Vuln. Integrity

NoneVI:N

Vuln. Availability

NoneVA:N

Subsequent System

Subseq. Confidentiality

HighSC:H

Subseq. Integrity

HighSI:H

Subseq. Availability

HighSA:H

7.9/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

Weakness Type (CWE)

Input Validation

Prototype Pollution

Ecosystems

Timeline

PublishedAug 5, 2025

ModifiedAug 5, 2025