Vulnerability DatabaseCVE-2021-26505
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CVE-2021-26505
August 11, 2023
Prototype pollution vulnerability in MrSwitch hello.js version 1.18.6, allows remote attackers to execute arbitrary code via hello.utils.extend function.
Affected Packages
hellojs (CDN_JS):
Affected version(s) >=0.1.0 <1.18.8
Fix Suggestion:
Update to version 1.18.8
hellojs (NPM):
Affected version(s) >=0.1.5 <1.18.8
Fix Suggestion:
Update to version 1.18.8
Related Resources (4)
https://github.com/MrSwitch/hello.js/commit/7ab50aeff2d41991f08d4ad6c0481125eea8f6b7
https://nvd.nist.gov/vuln/detail/CVE-2021-26505
https://github.com/MrSwitch/hello.js/issues/634
https://github.com/MrSwitch/hello.js
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CVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
CWE-1321
EPSS
Base Score:
1.26