Vulnerability · Published Oct 22, 2020 · Assigned by GitHub_M

CVE-2020-15270Improper session expiration in Parse Server

Medium 4.3

In plain English

A medium-severity security flaw in parse-server from parse-community. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 67% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)1.2%top 32.6% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	parse-server	4.4.0	GHSA-2xm2-xj2q-qgpj

Affected products (as reported)

Vendor	Product	Versions
parse-community	parse-server	<= 4.3.0

Weakness: CWE-672 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

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