vulnerabilitymediumCVE-2026-2559

CVE-2026-2559: The Post SMTP plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability c

zeroday.news·112d ago

CVE-2026-2559vulnerability

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The Post SMTP plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `handle_office365_oauth_redirect()` function in all versions up to, and including, 3.8.0. This is due to the function being hooked to `admin_init` without any `current_user_can()` check or nonce verification. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite the site's Office 365 OAuth mail configuration (access token, refresh token, and user email) via a crafted URL. The configuration option is used during wizard setup of Microsoft365 SMTP, only available in the Pro option of the plugin. This could cause an Admi

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