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

published 2025-10-14 12 mo ago modified 2026-10-08 31 d ago also GHSA-9f2h-7v79-mxw3 , EUVD-2025-34458

cvss: 6.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits: 0; none known

Parse Javascript SDK provides access to the powerful Parse Server backend from your JavaScript app. Prior to 7.0.0, injection of malicious payload allows attacker to remotely execute arbitrary code. ParseObject.fromJSON, ParseObject.pin, ParseObject.registerSubclass, ObjectStateMutations (internal), and encode/decode (internal) are affected. This vulnerability is fixed in 7.0.0.

Patch / fix

fixed in 1 links 3

npm parse 7.0.0

github.com/parse-community/Parse-SDK-JS@0097398 commit
github.com/parse-community/Parse-SDK-JS#2749 pull request
github.com/parse-community/Parse-SDK-JS/releases/tag/7.0.0-alpha.1 release

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 12 mo ago (2025-10-14)

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L
GitHub	3.1	6.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L

Affected packages

ecosystem	package	affected	fixed in
npm	parse	<7.0.0	7.0.0

Affected products

parse-community Parse-SDK-JS

Classification

Weakness

CWE-1321 Improperly Controlled Modification of Object Prototype Attributes

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary