HOMEVULNERABILITIESCVE-2020-7766
CRITICAL

CVE-2020-7766

CWE-1321Published: November 10, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

This affects all versions of package json-ptr. The issue occurs in the set operation (https://flitbit.github.io/json-ptr/classes/_src_pointer_.jsonpointer.htmlset) when the force flag is set to true. The function recursively set the property in the target object, however it does not properly check the key being set, leading to a prototype pollution.

NVD Source

Technical Analysis

CVE-2020-7766 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

json-ptr_project1 product(s)
json-ptr
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1038396
ADVISORYhttps://snyk.io/vuln/SNYK-JS-JSONPTR-1016939
ADVISORYhttps://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1038396
ADVISORYhttps://snyk.io/vuln/SNYK-JS-JSONPTR-1016939

All References (6)

→
https://github.com/flitbit/json-ptr/blob/master/src/util.ts%23L174Broken Link
→
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1038396Exploit · Third Party Advisory
→
https://snyk.io/vuln/SNYK-JS-JSONPTR-1016939Exploit · Third Party Advisory
→
https://github.com/flitbit/json-ptr/blob/master/src/util.ts%23L174Broken Link
→
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1038396Exploit · Third Party Advisory
→
https://snyk.io/vuln/SNYK-JS-JSONPTR-1016939Exploit · Third Party Advisory

Quick Facts

CVE IDCVE-2020-7766
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-1321
CISA KEVNo
Affected1 vendor(s)
PublishedNov 10, 2020

Related CVEs (CWE-1321)

CVE-2021-23449
10.0
CVE-2024-38999
10.0
CVE-2024-39008
10.0
CVE-2020-12079
10.0
CVE-2023-26121
10.0
CVE-2021-23594
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-7766 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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