🛡️ CVE-2021-23421 — merge-change

🔴 CVSS 9.5 — Critical ✅ No Known Exploit CWE-915 OSV
9.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Prototype Pollution in merge-change

All current versions of package merge-change are vulnerable to Prototype Pollution via the utils.set function.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2021-23421 is classified as CWE-915: Improperly Controlled Modification of Object Attributes. A request can set object fields that were never meant to be writable from outside.

Affected software

CVE-2021-23421 is recorded against 1 package.

  • merge-change

Timeline and source

Published on 1 September 2021 and last revised on 8 November 2023. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
github.com (Package)
github.com (Web)
snyk.io (Web)

Details

Severity CRITICAL
CVSS Score 9.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-915
Public Exploit ✅ No
Source OSV
Published 2021-09-01
Updated 2026-08-12
Modified 2023-11-08
Fix URL N/A

Affected Packages

Software From version Fixed in
merge-change — —

Exploit Protection

Are you running merge-change?

CVE-2021-23421 carries CVSS 9.5 Critical rating. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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