Mozilla Rhino up to 1.8.0 toFixed resource consumption

Summaryinfo

A vulnerability classified as problematic has been found in Mozilla Rhino up to 1.8.0. Impacted is the function toFixed. This manipulation causes resource consumption. This vulnerability is tracked as CVE-2025-66453. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Mozilla Rhino up to 1.8.0. Affected by this vulnerability is the function toFixed. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

Rhino is an open-source implementation of JavaScript written entirely in Java. Prior to 1.8.1, 1.7.15.1, and 1.7.14.1, when an application passed an attacker controlled float poing number into the toFixed() function, it might lead to high CPU consumption and a potential Denial of Service. Small numbers go through this call stack: NativeNumber.numTo > DToA.JS_dtostr > DToA.JS_dtoa > DToA.pow5mult where pow5mult attempts to raise 5 to a ridiculous power. This vulnerability is fixed in 1.8.1, 1.7.15.1, and 1.7.14.1.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-66453 since 12/01/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 277410 (Linux Distros Unpatched Vulnerability : CVE-2025-66453), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.7.14.1, 1.7.15.1 or 1.8.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (277410) and CERT Bund (WID-SEC-2026-0783). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• IBM QRadar SIEM

Productinfo

Type

• Web Browser

Vendor

• Mozilla

Name

• Rhino

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8.0

License

• open-source

Website

• Vendor: https://www.mozilla.org/
• Product: https://github.com/mozilla/rhino/

CPE 2.3info

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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