CVE-2025-54803

Public Exploit

js-toml is vulnerable to Prototype Pollution

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.

References

Link	Tags
https://github.com/sunnyadn/js-toml/security/advisories/GHSA-65fc-cr5f-v7r2
https://github.com/sunnyadn/js-toml/commit/b125910a3f094b744c9c3571360d4b9e3a472f66
https://gist.github.com/siunam321/f3dc4d21a5a932c67b6c11d0026f5afc

Frequently Asked Questions

What is the severity of CVE-2025-54803?: CVE-2025-54803 has been scored as a high severity vulnerability.
How to fix CVE-2025-54803?: To fix CVE-2025-54803, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-54803 being actively exploited in the wild?: It is possible that CVE-2025-54803 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-54803?: CVE-2025-54803 affects sunnyadn js-toml.

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Description

Category

CWE-1321 – Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

References

Frequently Asked Questions