How severe is CVE-2020-15270?

CVE-2020-15270 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2020-15270 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15270?

CVE-2020-15270 affects Parseplatform Parse-server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15270?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-15270 published?

CVE-2020-15270 was published on 2020-10-22 and last updated on 2026-06-17.

CVE-2020-15270

CVE-2020-15270 is a medium-severity vulnerability in Parseplatform Parse-server with a CVSS 3.x base score of 4.3. 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-672.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-672
Affected product: Parseplatform Parse-server
Published: 2020-10-22
Last modified: 2026-06-17

Description

Parse Server (npm package parse-server) broadcasts events to all clients without checking if the session token is valid. This allows clients with expired sessions to still receive subscription objects. It is not possible to create subscription objects with invalid session tokens. The issue is not patched.

Frequently asked questions

What is CVE-2020-15270?: Parse Server (npm package parse-server) broadcasts events to all clients without checking if the session token is valid. This allows clients with expired sessions to still receive subscription objects. It is not possible to create subscription objects with invalid session tokens. The issue is not patched.
How severe is CVE-2020-15270?: CVE-2020-15270 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2020-15270 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15270?: CVE-2020-15270 affects Parseplatform Parse-server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15270?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-15270 published?: CVE-2020-15270 was published on 2020-10-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*

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