What’s Vulnerable › Vulnerabilities

CVE-2020-5251: Information disclosure in parse-server

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-03-04 · updated 2026-06-17
• Weakness: CWE-285

Description

In parser-server before version 4.1.0, you can fetch all the users objects, by using regex in the NoSQL query. Using the NoSQL, you can use a regex on sessionToken and find valid accounts this way.

Affected products

• parse-community parse-server: before 4.1.0 — fixed in 4.1.0

How to fix

Upgrade to a fixed version: parse-community parse-server 4.1.0. Check the vendor advisory for mitigations.

References

• https://github.com/parse-community/parse-server/commit/3a3a5eee5ffa48da1352423312cb767de14de269
• https://github.com/parse-community/parse-server/security/advisories/GHSA-h4mf-75hf-67w4
• https://github.com/parse-community/parse-server/commit/3a3a5eee5ffa48da1352423312cb767de14de269
• https://github.com/parse-community/parse-server/security/advisories/GHSA-h4mf-75hf-67w4

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