{"id":"CVE-2026-93641","aliases":["EUVD-2026-87098","GHSA-q6cg-4x8w-53j7"],"status":"published","title":"Zimbra Collaboration Suite Classic Web Client Stored Cross-Site Scripting via Forged Share Invitation","description":"An unauthenticated sender can forge a share notification that triggers stored XSS when a signed-in Zimbra Classic recipient clicks Accept Share, allowing the attacker to access mailbox data and act as the victim.","severity":{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00273,"percentile":0.1984,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-09-25T13:55:10Z","modified":"2026-09-29T21:29:07Z","products":[{"vendor":"synacor","product":"zimbra collaboration suite (zcs)"},{"vendor":"zimbra","product":"zimbra collaboration suite (zcs)"}],"references":[{"url":"https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93641"},{"url":"https://github.com/advisories/GHSA-q6cg-4x8w-53j7"}],"sources":{"cve":[{"id":"CVE-2026-93641","title":"Zimbra Collaboration Suite Classic Web Client Stored Cross-Site Scripting via Forged Share Invitation","description":"An unauthenticated sender can forge a share notification that triggers stored XSS when a signed-in Zimbra Classic recipient clicks Accept Share, allowing the attacker to access mailbox data and act as the victim.","status":"published","published":"2026-09-25T13:55:10.616Z","modified":"2026-09-25T16:11:43.921Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","level":"critical","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:19:54.50686Z"}],"euvd":[{"id":"EUVD-2026-87098","description":"An unauthenticated sender can forge a share notification that triggers stored XSS when a signed-in Zimbra Classic recipient clicks Accept Share, allowing the attacker to access mailbox data and act as the victim.","status":"published","published":"2026-09-25T13:55:10Z","modified":"2026-09-25T16:11:43Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T17:27:55.413842Z"}],"ghsa":[{"id":"GHSA-q6cg-4x8w-53j7","title":"An unauthenticated sender can forge a share notification that triggers stored XSS when a signed...","description":"An unauthenticated sender can forge a share notification that triggers stored XSS when a signed-in Zimbra Classic recipient clicks Accept Share, allowing the attacker to access mailbox data and act as the victim.","status":"published","published":"2026-09-25T15:31:47Z","modified":"2026-09-25T15:31:54Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","level":"critical"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:12:27.190195Z"}],"nvd":[{"id":"CVE-2026-93641","description":"An unauthenticated sender can forge a share notification that triggers stored XSS when a signed-in Zimbra Classic recipient clicks Accept Share, allowing the attacker to access mailbox data and act as the victim.","status":"published","published":"2026-09-25T14:17:23.29Z","modified":"2026-09-29T21:29:07.663Z","cvss":[{"version":"3.1","score":9.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","level":"critical","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:51.721923Z"}]}}