How severe is CVE-2020-5251?

CVE-2020-5251 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2020-5251 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5251?

CVE-2020-5251 affects Parseplatform Parse-server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5251?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-5251 published?

CVE-2020-5251 was published on 2020-03-04 and last updated on 2026-06-17.

CVE-2020-5251

CVE-2020-5251 is a high-severity vulnerability in Parseplatform Parse-server with a CVSS 3.x base score of 7.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: High (CVSS 3.x base score 7.7)
CVSS v2: 5.0
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Parseplatform Parse-server
Published: 2020-03-04
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-5251?: 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.
How severe is CVE-2020-5251?: CVE-2020-5251 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2020-5251 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5251?: CVE-2020-5251 affects Parseplatform Parse-server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5251?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-5251 published?: CVE-2020-5251 was published on 2020-03-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:*:*:*

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