CVE-2024-25618

Summary

CVE-2024-25618, a vulnerability affecting Mastodon, a free and open-source social network server based on ActivityPub, allows for possible account takeover if the authentication provider allows changing the email address or multiple authentication providers are configured. This vulnerability affects all users logging in through external authentication providers. The severity is medium as it requires the external authentication provider to misbehave. However, some well-known OIDC providers, such as Microsoft Azure, make it very easy to exploit. Remediation for this vulnerability involves ensuring that the authentication provider does not allow changing the email address or configuring only one authentication provider. The potential danger posed to organizations is that an attacker could hijack user accounts and potentially gain unauthorized access to sensitive information or perform malicious activities on the platform.

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