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CVE-2025-66453 Rhino

Affected softwareRhino
Severity5.5 Medium CVSS 4.0 2 scores
Fixed in1.7.14.1, 1.7.15.1, 1.8.1
WeaknessUncontrolled resource consumption (CWE-400)
Published3 Dec 2025
Updated18 Oct 2026

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.

Exploitation status

No public exploit

No exploit has been reported in the sources we check.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 0.29% chance in 30 days

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

A public code fix exists: mozilla/rhino 2bcf4c4.

  • Protection none
  • Action unverified
  • Review automated Upstream data
  • Record active
Decided by Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all
Finding This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.
Candidate fix https://github.com/mozilla/rhino/security/advisories/GHSA-3w8q-xq97-5j7x : the maintainers' own security advisory: names the version that fixes it, so the fix is the difference between two releases

CVSS

5.5 MEDIUM v4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 4.0 5.5 MEDIUM CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X security-advisories@github.com Secondary published
CVSS 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H NVD Primary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update April 2026 ↗ CPU 2026-Q2 Oracle REST Data Services / REST Services (Rhino) (24.2.0, 24.2.1, 24.3.0, 24.3.1, 24.4.0, 25.1.1, 25.2.0, 25.2.1, 25.2.2, 25.2.3, 25.3.0, 25.3.1, 25.4.0)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle REST Data Services REST Services (Rhino) 24.2.0, 24.2.1, 24.3.0, 24.3.1, 24.4.0, 25.1.1, 25.2.0, 25.2.1, 25.2.2, 25.2.3, 25.3.0, 25.3.1, 25.4.0 24.2.0 · 24.2.1 · 24.3.0 · 24.3.1 · 24.4.0 · 25.1.1 · 25.2.0 · 25.2.1 · 25.2.2 · 25.2.3 · 25.3.0 · 25.3.1 · 25.4.0

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.mozilla:rhino 0 1.7.14.1 unbounded
org.mozilla:rhino 1.7.15 1.7.15.1 unbounded
org.mozilla:rhino 1.8.0 1.8.1 unbounded

Products and versions

2 products, 6 version entries
SourceVendorProductSchemeAffected versions
nvd mozilla rhino generic < 1.7.14.1 · 1.7.15 · 1.8.0
osv org.mozilla rhino generic < 1.7.14.1 · ≥ 1.7.15 and < 1.7.15.1 · ≥ 1.8.0 and < 1.8.1

References

URLTags
https://github.com/mozilla/rhino/security/advisories/GHSA-3w8q-xq97-5j7x advisory
https://github.com/mozilla/rhino/commit/2bcf4c43deace35f1f57d86377c6767b0608986e WEB
https://github.com/mozilla/rhino PACKAGE

Timeline

Published2025-12-03By the CVE Program.
NVD record modified2026-10-18NVD's own last-modified date for this record.