CVE-2026-67351: Serendipity < 2.6.1 Authentication Bypass via Username Collision
Serendipity before 2.6.1 contains an authentication context confusion vulnerability where password validation and session loading operate independently without ensuring both use the same user record. An authenticated Editor can create a username collision with an Administrator account and obtain administrative privileges by logging in with their own password while the session loads the Administrator's account data.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-67351?
CVE-2026-67351 has a severity score of 8.8, which is considered high.
How do I fix CVE-2026-67351?
To fix CVE-2026-67351, update Serendipity to version 2.6.1 or later.
What types of attacks does CVE-2026-67351 expose?
CVE-2026-67351 exposes systems to authentication bypass attacks via username collision.
Who is affected by CVE-2026-67351?
CVE-2026-67351 affects users of Serendipity versions prior to 2.6.1, especially those with Editor or Administrator roles.
What can an attacker achieve with CVE-2026-67351?
An attacker exploiting CVE-2026-67351 can gain unauthorized access to an Administrator account by creating a username collision.