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      <title>CVE-2026-76087 — Formie: Unauthenticated users can overwrite incomplete submissions via submit action</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-76087</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; verbb formie&lt;/p&gt;
&lt;p&gt;Formie is a Craft CMS plugin for creating forms. Prior to 2.2.23 and 3.1.31, Formie&amp;#39;s anonymous formie/submissions/submit action in SubmissionsController::actionSubmit trusts a client-supplied submissionId when loading an incomplete submission without session binding, ownership validation, or a valid submissionEditToken. An unauthenticated attacker can enumerate sequential IDs and overwrite or hijack another user&amp;#39;s in-progress multi-page or save-for-later submission, and the modified data can be persisted and forwarded through notifications or integrations when the submission is completed. This is an incomplete remediation of CVE-2026-47266 because that earlier change validated edit tokens for save-submission but did not protect submit. Completed submissions are excluded by the isIncomplete filter. This issue is fixed in versions 2.2.23 and 3.1.31.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; verbb formie&lt;/p&gt;
&lt;p&gt;Formie is a Craft CMS plugin for creating forms. Prior to 2.2.23 and 3.1.31, Formie&amp;#39;s anonymous formie/submissions/submit action in SubmissionsController::actionSubmit trusts a client-supplied submissionId when loading an incomplete submission without session binding, ownership validation, or a valid submissionEditToken. An unauthenticated attacker can enumerate sequential IDs and overwrite or hijack another user&amp;#39;s in-progress multi-page or save-for-later submission, and the modified data can be persisted and forwarded through notifications or integrations when the submission is completed. This is an incomplete remediation of CVE-2026-47266 because that earlier change validated edit tokens for save-submission but did not protect submit. Completed submissions are excluded by the isIncomplete filter. This issue is fixed in versions 2.2.23 and 3.1.31.&lt;/p&gt;</content:encoded>
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