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Parse Javascript SDK vulnerable to prototype pollution in `Parse.Object` and internal APIs

Moderate severity GitHub Reviewed Published Oct 14, 2025 in parse-community/Parse-SDK-JS • Updated Oct 14, 2025

Package

npm parse (npm)

Affected versions

< 7.0.0

Patched versions

7.0.0

Description

Summary

Prototype pollution capabilities on various APIs.

Details

Injection of malicious payload allows attacker to remotely execute arbitrary code. Parse.Object and internal APIs are affected, specifically:

  • ParseObject.fromJSON
  • ParseObject.pin
  • ParseObject.registerSubclass
  • ObjectStateMutations (internal)
  • encode/decode (internal)

PoC

Demonstrative tests added as part of the fix.

References

References

@mtrezza mtrezza published to parse-community/Parse-SDK-JS Oct 14, 2025
Published by the National Vulnerability Database Oct 14, 2025
Published to the GitHub Advisory Database Oct 14, 2025
Reviewed Oct 14, 2025
Last updated Oct 14, 2025

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(21st percentile)

Weaknesses

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. Learn more on MITRE.

CVE ID

CVE-2025-62374

GHSA ID

GHSA-9f2h-7v79-mxw3

Source code

Credits

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