Vulnerability in Immer Project
CVE-2021-23436
This affects the package immer before 9.0.6. A type confusion vulnerability can lead to a bypass of CVE-2020-28477 when the user-provided keys used in the path parameter are arrays. In particular, this bypass is possible because the condition (p === "__proto__" || p === "constructor") in applyPatches_ returns false if p is ['__proto__'] (or ['constructor']). The === operator (strict equality operator) returns false if the operands have different type.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.018 (77.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- Immer Project
- Immer — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- snyk.io/vuln/SNYK-JS-IMMER-1540542 (Exploit, Patch, Third Party Advisory)
- snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1579266 (Exploit, Patch, Third Party Advisory)
- github.com/immerjs/immer/commit/fa671e55ee9bd42ae08cc239102b665a23958237 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-23436?
- CVE-2021-23436 is a medium-severity vulnerability in Immer Project, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 5.6/10. Published 2021-09-01.
- How severe is CVE-2021-23436?
- Medium severity. CVSS v3 base score is 5.6 out of 10.
- Is CVE-2021-23436 known to be exploited?
- 21 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.