CVE-2023-42446

MEDIUM 6.5CVE-2023-42446 · Published 18/09/2023 · updated 17/06/2026

In short

CVE-2023-42446 is a MEDIUM (CVSS 6.5) vulnerability affecting pow (powauth).
Chance of exploitation in the next 30 days (EPSS): 0.55%, higher than 46.0% of all vulnerabilities.
Fix: update to 1.0.34 or later.

Package	Affected versions	Patched versions
pow powauth	`≥ 1.0.14, < 1.0.34`	`1.0.34`

Description

Pow is a authentication and user management solution for Phoenix and Plug-based apps. Starting in version 1.0.14 and prior to version 1.0.34, use of `Pow.Store.Backend.MnesiaCache` is susceptible to session hijacking as expired keys are not being invalidated correctly on startup. A session may expire when all `Pow.Store.Backend.MnesiaCache` instances have been shut down for a period that is longer than a session's remaining TTL. Version 1.0.34 contains a patch for this issue. As a workaround, expired keys, including all expired sessions, can be manually invalidated.

References

pow-auth/pow · Exploit
pow-auth/pow security advisory · Vendor Advisory

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