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CVE-2025-54803

Sunnyadn Js-toml vulnerability

7.5 HIGHPublic exploitEPSS 0.50%
  1. Published4 Aug 2025

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

Sunnyadn Js-toml< 1.0.2

Remediation

Fixed in
Sunnyadn Js-toml≥ 1.0.2

References

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Frequently asked

Is CVE-2025-54803 being actively exploited?

CVE-2025-54803 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.50%.

How severe is CVE-2025-54803?

CVE-2025-54803 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.50% probability of exploitation.

Which products are affected by CVE-2025-54803?

Affected products include Sunnyadn Js-toml.

How do I fix CVE-2025-54803?

Upgrade affected software to a fixed version, for example Sunnyadn Js-toml 1.0.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.