{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-104733", "assignerOrgId": "455daabc-a392-441d-aa46-37d35189897c", "state": "PUBLISHED", "assignerShortName": "NCSC.ch", "dateReserved": "2026-10-02T11:49:34.103Z", "datePublished": "2026-10-02T12:19:10.635Z", "dateUpdated": "2026-10-02T12:19:10.635Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "455daabc-a392-441d-aa46-37d35189897c", "shortName": "NCSC.ch", "dateUpdated": "2026-10-02T12:19:10.635Z"}, "title": "User Impersonation/Authorization Bypass in XMPP Server ejabberd", "datePublic": "2026-07-31T09:01:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "description": "User Impersonation"}]}], "impacts": [{"descriptions": [{"lang": "en", "value": "Authorization Bypass"}]}], "affected": [{"vendor": "ProcessOne", "product": "ejabberd", "platforms": ["MacOS", "Linux"], "repo": "https://github.com/processone/ejabberd", "versions": [{"status": "affected", "version": "0", "lessThanOrEqual": "26.04", "changes": [{"at": "26.07", "status": "unaffected"}], "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "User Impersonation in ProcessOnes XMMP Server ejabberd <= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "User Impersonation in ProcessOnes XMMP Server ejabberd &lt;= 26.04 allows an attacker to impersonate arbitrary users via unvalidated authzid parameter in SASL-PLAIN mechanism."}]}], "references": [{"url": "https://www.nsideattacklogic.de/advisories/NSIDE-SA-2026-004/", "tags": ["third-party-advisory"]}, {"url": "https://github.com/processone/ejabberd/releases#release-26.07", "tags": ["release-notes"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "exploitMaturity": "PROOF_OF_CONCEPT", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.4, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:H/SI:H/SA:H/E:P"}}], "workarounds": [{"lang": "en", "value": "Disable the SALS-PLAIN authentication mechanism", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Disable the SALS-PLAIN authentication mechanism"}]}], "solutions": [{"lang": "en", "value": "Update to the latest version of ejabberd (26.07)", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Update to the latest version of ejabberd (26.07)"}]}], "credits": [{"lang": "en", "value": "Marius Schwarz (NSIDE ATTACK LOGIC GmbH)", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}}}

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