Improper access control in Postorius - CVE-2021-40347

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Main Vulnerability Database Vulnerabilities #VU56454

Improper access control in Postorius - CVE-2021-40347

Published: September 12, 2021


Vulnerability identifier: #VU56454
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-40347
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: GNU
Affected software:
Postorius

Detailed vulnerability description

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in views/list.py. A remote user logged in into any account can send a specially crafted HTTP POST request to unsubscribe any user from a mailing list, also revealing whether that address was subscribed in the first place.


How to mitigate CVE-2021-40347

Install updates from vendor's website.

Sources