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        "cveId": "CVE-2026-93639",
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        "state": "PUBLISHED",
        "assignerShortName": "rapid7",
        "dateReserved": "2026-09-18T12:22:38.559Z",
        "datePublished": "2026-10-23T13:29:25.939Z",
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            "title": "Zimbra Collaboration Suite Missing Authorization in ConfigureZimlet Enables Delegated Administrator Privilege Escalation",
            "datePublic": "2026-10-23T13:03:00.000Z",
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                            "cweId": "CWE-862",
                            "description": "CWE-862 Missing Authorization",
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                    "vendor": "Zimbra",
                    "product": "Zimbra Collaboration Suite",
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                            "version": "0",
                            "lessThanOrEqual": "10.1.20",
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                    "value": "A missing authorization vulnerability in Zimbra Collaboration Suite (ZCS) allows a delegated administrator with no explicit administrative grants to overwrite global Zimlet configuration through ConfigureZimletRequest. The uploaded configuration can also add an attacker-controlled domain to the proxy allowlist of the default class of service. If a signed-in user in that class opens a crafted /service/proxy URL, Zimbra serves attacker-controlled HTML under its own origin. The resulting JavaScript can read mailbox data and perform authenticated actions as the victim. Exploitation requires a delegated-administrator account and access to the admin SOAP service; the browser compromise additionally requires the victim to open the crafted URL. ZCS 10.1.16 and 10.1.20 are affected.",
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            "references": [
                {
                    "url": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories",
                    "tags": [
                        "vendor-advisory"
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                },
                {
                    "url": "https://www.rapid7.com/blog/post/ve-breaking-zimbra-identity-boundaries-part-1/",
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                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "LOW",
                        "userInteraction": "REQUIRED",
                        "scope": "CHANGED",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "availabilityImpact": "NONE",
                        "baseSeverity": "HIGH",
                        "baseScore": 8.7,
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"
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                {
                    "lang": "en",
                    "value": "Jonah Burgess (CryptoCat), Senior Security Researcher, Rapid7",
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                                "id": "CVE-2026-93639",
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