CVE-2021-23820
Prototype Pollution
Description
This affects all versions of package json-pointer. A type confusion vulnerability can lead to a bypass of CVE-2020-7709 when the pointer components are arrays.
INFO
Published Date :
Nov. 3, 2021, 6:15 p.m.
Last Modified :
Nov. 21, 2024, 5:51 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2021-23820
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | HIGH | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Public PoC/Exploit Available at Github
CVE-2021-23820 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-23820.
| URL | Resource |
|---|---|
| https://github.com/manuelstofer/json-pointer/blob/master/index.js%23L78 | Third Party Advisory |
| https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1910686 | Exploit Mitigation Patch Third Party Advisory VDB Entry |
| https://snyk.io/vuln/SNYK-JS-JSONPOINTER-1577287 | Exploit Mitigation Patch Third Party Advisory VDB Entry |
| https://github.com/manuelstofer/json-pointer/blob/master/index.js%23L78 | Third Party Advisory |
| https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1910686 | Exploit Mitigation Patch Third Party Advisory VDB Entry |
| https://snyk.io/vuln/SNYK-JS-JSONPOINTER-1577287 | Exploit Mitigation Patch Third Party Advisory VDB Entry |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-23820 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-23820
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
My personal repository
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Dockerfile Go HTML CSS JavaScript Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-23820 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-23820 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Reanalysis by [email protected]
Mar. 06, 2025
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:manuelstofer:jsonpointer:*:*:*:*:*:node.js:*:* versions from (excluding) 0.6.2 OR *cpe:2.3:a:manuelstofer:json-pointer:*:*:*:*:*:node.js:*:* versions from (excluding) 0.6.2 -
Modified Analysis by [email protected]
Mar. 05, 2025
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:jsonpointer_project:jsonpointer:-:*:*:*:*:node.js:*:* OR *cpe:2.3:a:manuelstofer:jsonpointer:*:*:*:*:*:node.js:*:* versions from (excluding) 0.6.2 -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/manuelstofer/json-pointer/blob/master/index.js%23L78 Added Reference https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1910686 Added Reference https://snyk.io/vuln/SNYK-JS-JSONPOINTER-1577287 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Nov. 05, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/manuelstofer/json-pointer/blob/master/index.js%23L78 No Types Assigned https://github.com/manuelstofer/json-pointer/blob/master/index.js%23L78 Third Party Advisory Changed Reference Type https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1910686 No Types Assigned https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1910686 Exploit, Mitigation, Patch, Third Party Advisory, VDB Entry Changed Reference Type https://snyk.io/vuln/SNYK-JS-JSONPOINTER-1577287 No Types Assigned https://snyk.io/vuln/SNYK-JS-JSONPOINTER-1577287 Exploit, Mitigation, Patch, Third Party Advisory, VDB Entry Added CWE NIST CWE-843 Added CPE Configuration OR *cpe:2.3:a:jsonpointer_project:jsonpointer:-:*:*:*:*:node.js:*:*
Vulnerability Scoring Details
Base CVSS Score: 9.8
Base CVSS Score: 7.5
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.20 }} 0.03%
score
0.42411
percentile