Code execution via unchecked prototype keys
Published Oct 14, 2025 · Updated Oct 14, 2025
Prototype pollution in Parse JavaScript SDK before 7.0.0 allows remote authenticated users to execute code through crafted object data. ParseObject.fromJSON, pin, registerSubclass, ObjectStateMutations, and encode/decode copy attacker-controlled keys into ordinary objects without rejecting proto, constructor, or prototype paths. Execution depends on a consuming application passing malicious data into an affected API; the polluted prototype can cross the SDK security scope and disrupt service or expose data.
Summary
What happened
Prototype pollution in Parse JavaScript SDK before 7.0.0 allows remote authenticated users to execute code through crafted object data. ParseObject.fromJSON, pin, registerSubclass, ObjectStateMutations, and encode/decode copy attacker-controlled keys into ordinary objects without rejecting proto, constructor, or prototype paths. Execution depends on a consuming application passing malicious data into an affected API; the polluted prototype can cross the SDK security scope and disrupt service or expose data.
The record
- CVE
- CVE-2025-62374
- Published
- Oct 14, 2025
- Updated
- Oct 14, 2025
- Vendor
- Parse Platform
- Product
- Parse JavaScript SDK
- Classifications
- CWE-1321
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 14, 2025CVE publishedPublication date reported by the CVE source.
- Oct 14, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 7.0.0-alpha.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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