Answer in brief
CVE-2021-23807 records a Medium severity (CVSS 5.6) vulnerability in Prototype Pollution in node-jsonpointer. The current sources do not mark it as known exploited. The current feed maps jsonpointer (npm), org.webjars.npm:json-pointer (npm). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps jsonpointer (npm), org.webjars.npm:json-pointer (npm). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| jsonpointernpm | >=0 <5.0.0 | 5.0.0 |
| org.webjars.npm:json-pointernpm | >=0 <5.0.0 | 5.0.0 |
Published upstream
Nov 8, 2021
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Sep 10, 2026
This affects the package `jsonpointer` before `5.0.0`. A type confusion vulnerability can lead to a bypass of a previous Prototype Pollution fix when the pointer components are arrays.
Quoted source text, attributed separately from HOL analysis.