🛡️ CVE-2025-66453 — rhino

🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-400 NVD

7.5

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2025-66453 is classified as CWE-400: Uncontrolled Resource Consumption. A request can consume memory, CPU or storage without limit, exhausting capacity for everyone else.

Affected software

CVE-2025-66453 is recorded against 2 packages.

org.mozilla:rhino (from 1.8.0 up to 1.8.1)
rhino

Timeline and source

Published on 3 December 2025 and last revised on 5 December 2025. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)

CVE-2025-66453 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Debian Ubuntu

Details

Severity LOW

CVSS Score 7.5

CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE CWE-400

Public Exploit ✅ No

Source NVD

Published 2025-12-03

Updated 2026-08-12

Modified 2025-12-05

Fix URL N/A

Affected Packages

Software	From version	Fixed in
org.mozilla:rhino	1.8.0	1.8.1
rhino	—	—

References

WEB https://github.com/mozilla/rhino/security/advisories/GHSA-3w8q-xq97-5j7x

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-66453

WEB https://github.com/mozilla/rhino/commit/2bcf4c43deace35f1f57d86377c6767b0608986e

PACKAGE https://github.com/mozilla/rhino

🔗 NVD 🔗 Mitre

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