Prototype Pollution in Ajv.js Ajv
CVE-2020-15366
An issue was discovered in ajv.validate() in Ajv (aka Another JSON Schema Validator) 6.12.2. A carefully crafted JSON schema could be provided that allows execution of other code by prototype pollution. (While untrusted schemas are recommended against, the worst case of an untrusted schema should be a denial of service, not execution of code.)
Vulnerability class: Prototype Pollution
EPSS: 0.023 (81.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Ajv.js Ajv — versions 6.12.2
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Permissions Required)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (Third Party Advisory, Release Notes)
- cve@mitre.org
Frequently asked questions
- What is CVE-2020-15366?
- CVE-2020-15366 is a medium-severity vulnerability in Ajv.js Ajv, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 5.6/10. Published 2020-07-15.
- How severe is CVE-2020-15366?
- Medium severity. CVSS v3 base score is 5.6 out of 10.
- Is CVE-2020-15366 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.