{"id":"CVE-2026-40589","state":"PUBLISHED","title":"FreeScout has Customer Edit Cross-Mailbox Email Takeover","description":"FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, a low-privileged agent can edit a visible customer and add an email address already owned by a hidden customer in another mailbox. The server discloses the hidden customer’s name and profile URL in the success flash, reassigns the hidden email to the visible customer, and rebinds hidden-mailbox conversations for that email to the visible customer. Version 1.8.214 fixes the issue.","publishedAt":"2026-04-21T16:50:22.119Z","updatedAt":"2026-04-21T20:37:22.372Z","severity":{"score":7.6,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["freescout-help-desk freescout"],"affected":[{"vendor":"freescout-help-desk","product":"freescout","versions":[{"version":"< 1.8.214","status":"affected"}]}],"references":["https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mv55-3mgv-fxwr","https://github.com/freescout-help-desk/freescout/commit/2e2fe37111d92ac665b9ad8806eac94a1a3e502c","https://github.com/freescout-help-desk/freescout/releases/tag/1.8.214"],"weaknesses":["CWE-639"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/40xxx/CVE-2026-40589.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-40589","state":"PUBLISHED","datePublished":"2026-04-21T16:50:22.119Z","dateUpdated":"2026-04-21T20:37:22.372Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-14T13:24:29.476Z"},"containers":{"cna":{"title":"FreeScout has Customer Edit Cross-Mailbox Email Takeover","descriptions":[{"lang":"en","value":"FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, a low-privileged agent can edit a visible customer and add an email address already owned by a hidden customer in another mailbox. The server discloses the hidden customer’s name and profile URL in the success flash, reassigns the hidden email to the visible customer, and rebinds hidden-mailbox conversations for that email to the visible customer. Version 1.8.214 fixes the issue."}],"affected":[{"vendor":"freescout-help-desk","product":"freescout","versions":[{"version":"< 1.8.214","status":"affected"}]}],"references":[{"url":"https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mv55-3mgv-fxwr","name":"https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mv55-3mgv-fxwr","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/freescout-help-desk/freescout/commit/2e2fe37111d92ac665b9ad8806eac94a1a3e502c","name":"https://github.com/freescout-help-desk/freescout/commit/2e2fe37111d92ac665b9ad8806eac94a1a3e502c","tags":["x_refsource_MISC"]},{"url":"https://github.com/freescout-help-desk/freescout/releases/tag/1.8.214","name":"https://github.com/freescout-help-desk/freescout/releases/tag/1.8.214","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.6,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-21T16:50:22.119Z"},"source":{"advisory":"GHSA-mv55-3mgv-fxwr","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mv55-3mgv-fxwr","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-21T20:17:25.465302Z","id":"CVE-2026-40589","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-21T20:37:22.372Z"}}]}}}