What’s Vulnerable › Vulnerabilities
CVE-2021-20083
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 4.2% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2021-04-23 · updated 2026-06-17
- Weakness: CWE-1321
Description
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in jquery-plugin-query-object 2.2.3 allows a malicious user to inject properties into Object.prototype.
Affected products
- jquery-plugin-query-object: 2.2.3
References
- http://packetstormsecurity.com/files/166299/WordPress-Core-5.9.0-5.9.1-Cross-Site-Scripting.html
- https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-query-object.md
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7CR6VGITIB2TXXZ6B5QRRWPU5S4BXQPD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IJX6NVXSRN3RX3YUVEJQ4WUTQSDL3DSR/
- http://packetstormsecurity.com/files/166299/WordPress-Core-5.9.0-5.9.1-Cross-Site-Scripting.html
- https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-query-object.md
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7CR6VGITIB2TXXZ6B5QRRWPU5S4BXQPD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IJX6NVXSRN3RX3YUVEJQ4WUTQSDL3DSR/
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