CVE-2021-23507Public exploitNetwork attack vector

Prototype pollution via non-string path coercion

Published Feb 4, 2022 · Updated Sep 17, 2024

Prototype pollution in skratchdot object-path-set before 1.0.2 allows remote attackers to modify shared object prototypes through setPath. setPath compares each path segment with forbidden string keys, but property access coerces an array-wrapped proto segment after validation and bypasses the check. A consuming application must pass an attacker-controlled path to expose the flaw; the demonstrated result adds an inherited property to subsequently created objects.

CVSS severity7.5
High
EPSS probability2.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Prototype pollution in skratchdot object-path-set before 1.0.2 allows remote attackers to modify shared object prototypes through setPath. setPath compares each path segment with forbidden string keys, but property access coerces an array-wrapped proto segment after validation and bypasses the check. A consuming application must pass an attacker-controlled path to expose the flaw; the demonstrated result adds an inherited property to subsequently created objects.

The record

CVE
CVE-2021-23507
Published
Feb 4, 2022
Updated
Sep 17, 2024
Vendor
skratchdot
Product
object-path-set
Classifications
CWE-1321, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 4, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <1.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

skratchdot · object-path-setversion=unspecified <1.0.2

Published CVSS scores

7.5SnykCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo