CVE-2020-15270

Name: CVE-2020-15270
Creator: NVD / NIST
Published: 2020-10-22T22:15:12.063+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 1.15%

Last modified Jun 17, 2026

CVE-2020-15270 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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. EPSS estimates a 1.15% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

1.15%

62.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Parseplatform	Parse-Server	<= 4.3.0

References

https://github.com/parse-community/parse-server/commit/78b59fb26b1c36e3cdbd42ba9fec025003267f58Patch, Third Party Advisory
https://github.com/parse-community/parse-server/security/advisories/GHSA-2xm2-xj2q-qgpjThird Party Advisory
https://npmjs.com/parse-serverProduct, Third Party Advisory
https://github.com/parse-community/parse-server/commit/78b59fb26b1c36e3cdbd42ba9fec025003267f58Patch, Third Party Advisory
https://github.com/parse-community/parse-server/security/advisories/GHSA-2xm2-xj2q-qgpjThird Party Advisory
https://npmjs.com/parse-serverProduct, Third Party Advisory

Timeline

Published: Oct 22, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-15270?

How severe is CVE-2020-15270?

CVE-2020-15270 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 1.15% probability of exploitation in the next 30 days.

How do I fix CVE-2020-15270?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-15270?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST