{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "state": "PUBLISHED",
        "cveId": "CVE-2021-30116",
        "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "assignerShortName": "mitre",
        "dateUpdated": "2025-10-21T23:25:41.692Z",
        "dateReserved": "2021-04-02T00:00:00.000Z",
        "datePublished": "2021-07-09T00:00:00.000Z"
    },
    "containers": {
        "cna": {
            "title": "Unauthenticated credential leak and business logic flaw in Kaseya VSA <= v9.5.6",
            "providerMetadata": {
                "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
                "shortName": "mitre",
                "dateUpdated": "2023-10-23T13:12:39.540Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Kaseya VSA before 9.5.7 allows credential disclosure, as exploited in the wild in July 2021. By default Kaseya VSA on premise offers a download page where the clients for the installation can be downloaded. The default URL for this page is https://x.x.x.x/dl.asp When an attacker download a client for Windows and installs it, the file KaseyaD.ini is generated (C:\\Program Files (x86)\\Kaseya\\XXXXXXXXXX\\KaseyaD.ini) which contains an Agent_Guid and AgentPassword This Agent_Guid and AgentPassword can be used to log in on dl.asp (https://x.x.x.x/dl.asp?un=840997037507813&pw=113cc622839a4077a84837485ced6b93e440bf66d44057713cb2f95e503a06d9) This request authenticates the client and returns a sessionId cookie that can be used in subsequent attacks to bypass authentication. Security issues discovered --- * Unauthenticated download page leaks credentials * Credentials of agent software can be used to obtain a sessionId (cookie) that can be used for services not intended for use by agents * dl.asp accepts credentials via a GET request * Access to KaseyaD.ini gives an attacker access to sufficient information to penetrate the Kaseya installation and its clients. Impact --- Via the page /dl.asp enough information can be obtained to give an attacker a sessionId that can be used to execute further (semi-authenticated) attacks against the system."
                }
            ],
            "affected": [
                {
                    "vendor": "n/a",
                    "product": "n/a",
                    "versions": [
                        {
                            "version": "n/a",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://csirt.divd.nl/2021/07/04/Kaseya-Case-Update-2/"
                },
                {
                    "url": "https://helpdesk.kaseya.com/hc/en-gb/articles/4403440684689-Important-Notice-July-2nd-2021"
                },
                {
                    "url": "https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/"
                },
                {
                    "url": "https://www.secpod.com/blog/kaseya-vsa-zero-day-by-revil/"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Discovered by Wietse Boonstra of DIVD"
                },
                {
                    "lang": "en",
                    "value": "Additional research by Frank Breedijk of DIVD"
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "CHANGED",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "availabilityImpact": "HIGH",
                        "baseScore": 10,
                        "baseSeverity": "CRITICAL"
                    }
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "type": "text",
                            "lang": "en",
                            "description": "n/a"
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                    ]
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            ],
            "x_generator": {
                "engine": "Vulnogram 0.0.9"
            },
            "source": {
                "advisory": "DIVD-2021-00011",
                "discovery": "INTERNAL"
            },
            "solutions": [
                {
                    "lang": "en",
                    "value": "Upgrade to a version after 9.5.6"
                }
            ]
        },
        "adp": [
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-03T22:24:59.326Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://csirt.divd.nl/2021/07/04/Kaseya-Case-Update-2/",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://helpdesk.kaseya.com/hc/en-gb/articles/4403440684689-Important-Notice-July-2nd-2021",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://www.secpod.com/blog/kaseya-vsa-zero-day-by-revil/",
                        "tags": [
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                        ]
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                ]
            },
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2021-30116",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "active"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2025-02-04T19:41:32.875937Z"
                            }
                        }
                    },
                    {
                        "other": {
                            "type": "kev",
                            "content": {
                                "dateAdded": "2021-11-03",
                                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30116"
                            }
                        }
                    }
                ],
                "references": [
                    {
                        "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30116",
                        "tags": [
                            "government-resource"
                        ]
                    }
                ],
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "lang": "en",
                                "type": "CWE",
                                "cweId": "CWE-522",
                                "description": "CWE-522 Insufficiently Protected Credentials"
                            }
                        ]
                    }
                ],
                "timeline": [
                    {
                        "time": "2021-11-03T00:00:00.000Z",
                        "lang": "en",
                        "value": "CVE-2021-30116 added to CISA KEV"
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2025-10-21T23:25:41.692Z"
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}