CVE-2021-20086 json
Prototype Pollution in jquery-bbq
published 2021-04-23 5 y ago modified 2026-06-17 4 mo ago also GHSA-7w8j-85wm-6xfq , EUVD-2021-1008
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 6.1%
- EPSS 6.1% chance of exploitation in 30 days, percentile 93%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in jquery-bbq 1.2.1 allows a malicious user to inject properties into Object.prototype.
Exploit prediction
6.10% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Odoo Apps - Cross-Site Scripting via Prototype Pollution nuclei detection template
- github.com https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-bbq.md referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
| GitHub | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | jquery-bbq | <=1.2.1 |
no fix listed |
Affected products
- n/a jquery-bbq
Classification
- Weakness
-
- CWE-1321 Improperly Controlled Modification of Object Prototype Attributes
References
Sources
- CVE List CVE-2021-20086
- GitHub Advisory GHSA-7w8j-85wm-6xfq
- NVD CVE-2021-20086
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