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    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-93483",
        "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "state": "PUBLISHED",
        "assignerShortName": "mitre",
        "dateReserved": "2026-09-18T04:33:42.990Z",
        "datePublished": "2026-10-15T03:43:10.406Z",
        "dateUpdated": "2026-10-15T03:43:10.406Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "product": "Znuny",
                    "repo": "https://github.com/znuny/znuny",
                    "vendor": "Znuny",
                    "versions": [
                        {
                            "lessThan": "6.5.25",
                            "status": "affected",
                            "version": "0",
                            "versionType": "semver"
                        },
                        {
                            "lessThan": "7.3.7",
                            "status": "affected",
                            "version": "7.0.0",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In Znuny through 7.3.6, an attacker can bypass specific standard login procedures and gain unauthorized access to sensitive system functions by manipulating a specific HTTP request header. Because the application incorrectly trusts this header, an attacker can impersonate any user, including administrators, without requiring a password. This grants full access to confidential data and system controls. More specifically, the HTTPBasicAuth modules for the agent (Kernel::System::Auth::HTTPBasicAuth) and customer (Kernel::System::CustomerAuth::HTTPBasicAuth) interfaces read the username to log in not only from $ENV{REMOTE_USER} (set by the web server after successful authentication), but also, as a fallback, from $ENV{HTTP_REMOTE_USER}, which is populated directly from an attacker-controllable \"Remote-User\" request header. On systems where HTTPBasicAuth was configured as the authentication backend, this allowed an attacker to log in as any existing user by sending a request with a forged Remote-User header, without providing any credentials."
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "Automatable": "YES",
                        "Recovery": "USER",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "attackVector": "NETWORK",
                        "baseScore": 9.5,
                        "baseSeverity": "CRITICAL",
                        "privilegesRequired": "NONE",
                        "providerUrgency": "RED",
                        "subAvailabilityImpact": "LOW",
                        "subConfidentialityImpact": "HIGH",
                        "subIntegrityImpact": "HIGH",
                        "userInteraction": "NONE",
                        "valueDensity": "NOT_DEFINED",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/AU:Y/R:U/RE:L/U:Red",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "LOW",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnerabilityResponseEffort": "LOW"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-348",
                            "description": "CWE-348 Use of Less Trusted Source",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
                "shortName": "mitre",
                "dateUpdated": "2026-10-15T03:43:10.406Z"
            },
            "references": [
                {
                    "url": "https://www.znuny.org/advisories"
                },
                {
                    "url": "https://www.znuny.org/en/advisories/zsa-2026-14"
                }
            ],
            "x_generator": {
                "engine": "CVE-Request-form 0.0.1"
            },
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:znuny:znuny:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "6.5.25"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:znuny:znuny:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "7.0.0",
                                    "versionEndExcluding": "7.3.7"
                                }
                            ]
                        }
                    ]
                }
            ]
        }
    }
}