Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution
Priority MEDIUM 55CWE-1321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 5.5.2 and 6.2.1, an attacker can use a prototype pollution sink to trigger a remote code execution through the MongoDB BSON parser. A patch is available in versions 5.5.2 and 6.2.1.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.03203 88th percentileScored 2026-11-07
Fix Fixed parse-server (parse-community): 5.5.2, 6.2.1parse-server (npm): 5.5.2, 6.2.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| parse-community | parse-server | before 5.5.2; 6.0.0 to before 6.2.1 | 5.5.2, 6.2.1 | Patch available | CNA |
| — | parse-server (npm) | before 5.5.2 | 5.5.2 | Patch available | GHSA-462x-c3jw-7vr6 |
| — | parse-server (npm) | 6.0.0 to before 6.2.1 | 6.2.1 | Patch available | GHSA-462x-c3jw-7vr6 |
- parse-server Vendorparse-community Affected before 5.5.2; 6.0.0 to before 6.2.1 Fixed in 5.5.2, 6.2.1 Patch available CNA
- parse-server (npm) Vendor— Affected before 5.5.2 Fixed in 5.5.2 Patch available GHSA-462x-c3jw-7vr6
- parse-server (npm) Vendor— Affected 6.0.0 to before 6.2.1 Fixed in 6.2.1 Patch available GHSA-462x-c3jw-7vr6
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* | before 5.5.2; 6.0.0 to before 6.2.1 | Vulnerable | parse-community |
- cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* Versions before 5.5.2; 6.0.0 to before 6.2.1 Vulnerable ·parse-community
Remediation
- Fix · CNA parse-server (parse-community) Fixed in 5.5.2, 6.2.1
- Fix · GHSA-462x-c3jw-7vr6 parse-server (npm) Fixed in 5.5.2 Advisory →
- Fix · GHSA-462x-c3jw-7vr6 parse-server (npm) Fixed in 6.2.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2023-36475
- 2026-10-03 Alias added: GHSA-462x-c3jw-7vr6
References
Patch 4
- https://github.com/parse-community/parse-server/issues/8674
- https://github.com/parse-community/parse-server/issues/8675
- https://github.com/parse-community/parse-server/commit/3dd99dd80e27e5e1d99b42844180546d90c7aa90
- https://github.com/parse-community/parse-server/commit/5fad2928fb8ee17304abcdcf259932f827d8c81f
Advisory 2
More parse-community Parse-server vulnerabilities
- TI-2022-08574 Command Injection in Parse server CVSS 3.1CRITICAL 10.0
- TI-2024-18136 Parse Server literalizeRegexPart SQL Injection CVSS 3.1CRITICAL 10.0
- TI-2022-18768 Parse Server vulnerable to Remote Code Execution via prototype pollution in MongoDB BSON parser CVSS 3.1CRITICAL 9.8
- TI-2024-31550 Parse Server's custom object ID allows to acquire role privileges CVSS 3.1HIGH 8.1
- TI-2026-23790 Parse Server session token exfiltration via `redirectClassNameForKey` query parameter CVSS 4.0CRITICAL 9.9
- TI-2026-24777 Parse Server: Account takeover via operator injection in authentication data identifier CVSS 4.0CRITICAL 9.3
Sources
- CVE-2023-36475 · CVE Program
- CVE-2023-36475 · NVD
- FIRST EPSS
- GHSA-462x-c3jw-7vr6 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences