CVE-2025-66453
December 03, 2025
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.
Affected Packages
https://github.com/mozilla/rhino.git (GITHUB):
Affected version(s) >=Rhino1_6R1_RELEASE <Rhino1_7_14_1_ReleaseFix Suggestion:
Update to version Rhino1_7_14_1_Releasehttps://github.com/mozilla/rhino.git (GITHUB):
Affected version(s) =Rhino1_8_0_Release <Rhino1_8_1_ReleaseFix Suggestion:
Update to version Rhino1_8_1_Releasehttps://github.com/mozilla/rhino.git (GITHUB):
Affected version(s) =Rhino1_7_15_Release <Rhino1_7_15_1_ReleaseFix Suggestion:
Update to version Rhino1_7_15_1_Releaseorg.mozilla:rhino (JAVA):
Affected version(s) =1.8.0 <1.8.1Fix Suggestion:
Update to version 1.8.1org.mozilla:rhino (JAVA):
Affected version(s) =1.7.15 <1.7.15.1Fix Suggestion:
Update to version 1.7.15.1org.mozilla:rhino (JAVA):
Affected version(s) >=1.7R3 <1.7.14.1Fix Suggestion:
Update to version 1.7.14.1Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.5
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
Exploit Maturity
POC
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Uncontrolled Resource Consumption
EPSS
Base Score:
0.06
