Critical severity · published Aug 11, 2023
CVE-2021-26505
Prototype pollution vulnerability in MrSwitch hello.js version 1.18.6, allows remote attackers to execute arbitrary code via hello.utils.extend function
9.8
CVSS
1.1%
EPSS
No
On KEV
Description
Prototype pollution vulnerability in MrSwitch hello.js version 1.18.6, allows remote attackers to execute arbitrary code via hello.utils.extend function.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 67% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HE
Hello.js · Hello.js Project
1.18.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26505
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26505
Issue Tracking
https://github.com/MrSwitch/hello.js/issues/634
More from Hello.js
9.9
CVE-2020-7741
This affects the package hellojs before 1.18.6