What’s Vulnerable › Vulnerabilities

CVE-2020-15270: Improper session expiration in Parse Server

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-10-22 · updated 2026-06-17
• Weakness: CWE-672

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.

Affected products

• parse-community parse-server: through 4.3.0

References

• https://github.com/parse-community/parse-server/commit/78b59fb26b1c36e3cdbd42ba9fec025003267f58
• https://github.com/parse-community/parse-server/security/advisories/GHSA-2xm2-xj2q-qgpj
• https://npmjs.com/parse-server
• https://github.com/parse-community/parse-server/commit/78b59fb26b1c36e3cdbd42ba9fec025003267f58
• https://github.com/parse-community/parse-server/security/advisories/GHSA-2xm2-xj2q-qgpj
• https://npmjs.com/parse-server

Get alerted when CVE-2020-15270 or the next vulnerability affects your stack