Medium 6.9Published Nov 10, 2025

CVE-2025-64502Parse Server allows public `explain` queries which may expose sensitive database performance information and schema details

Updated under an hour ago (Oct 28, 2026, 11:00 AM ET)

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It affects parse-community parse-server. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for parse-community parse-server

Exploited in the last 30 days

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. The MongoDB `explain()` method provides detailed information about query execution plans, including index usage, collection scanning behavior, and performance metrics. Prior to version 8.5.0-alpha.5, Parse Server permits any client to execute explain queries without requiring the master key. This exposes database schema structure and field names, index configurations and query optimization details, query execution statistics and performance metrics, and potential attack vectors for database performance exploitation. In version 8.5.0-alpha.5, a new `databaseOptions.allowPublicExplain` configuration option has been introduced that allows to restrict `explain` queries to the master key. The option defaults to `true` for now to avoid a breaking change in production systems that depends on public `explain` availability. In addition, a security warning is logged when the option is not explicitly set, or set to `true`. In a future major release of Parse Server, the default will change to `false`. As a workaround, implement middleware to block explain queries from non-master-key requests, or monitor and alert on explain query usage in production environments.

CVSS: 6.9 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N
Weakness (CWE): CWE-201
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Nov 12, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

parse-community parse-server parse_community:parse_server (from the name)	before 8.5.0-alpha.5	CNA record

References

References

https://github.com/parse-community/parse-server/security/advisories/GHSA-7cx5-254x-cgrq	x-refsource-confirm
https://github.com/parse-community/parse-server/pull/9890	x-refsource-misc
https://github.com/parse-community/parse-server/commit/4456b02280c2d8dd58b7250e9e67f1a8647b3452	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.