{"api_version":"1","generated_at":"2026-06-24T14:49:02+00:00","cve":"CVE-2026-44961","urls":{"html":"https://cve.report/CVE-2026-44961","api":"https://cve.report/api/cve/CVE-2026-44961.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-44961","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-44961"},"summary":{"title":"CVE-2026-44961","description":"The XML‑RPC API addUser method has a validation bypass introduced in the fix for CVE‑2025‑55129. As a result, API users could create usernames that enabled impersonation or stored XSS attacks. Proper validation has been added where it was missing.","state":"PUBLISHED","assigner":"hackerone","published_at":"2026-06-23 17:17:00","updated_at":"2026-06-23 18:17:52"},"problem_types":["CWE-287","CWE-287 CWE-287 Improper Authentication - Generic"],"metrics":[{"version":"3.0","source":"support@hackerone.com","type":"Secondary","score":"0","severity":"NONE","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","data":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","baseScore":0,"baseSeverity":"NONE","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"NONE"}},{"version":"3.0","source":"CNA","type":"DECLARED","score":"0","severity":"NONE","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","data":{"baseScore":0,"baseSeverity":"NONE","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","version":"3.0"}}],"references":[{"url":"https://hackerone.com/reports/3680090","name":"https://hackerone.com/reports/3680090","refsource":"support@hackerone.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-44961","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44961","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Revive","product":"Adserver","version":"affected 6.0.6 semver","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"barcrange (3l4)","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-44961","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-06-23T17:32:45.247422Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-06-23T17:44:07.348Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Adserver","vendor":"Revive","versions":[{"lessThanOrEqual":"6.0.6","status":"affected","version":"0","versionType":"semver"}]}],"credits":[{"lang":"en","type":"reporter","value":"barcrange (3l4)"}],"descriptions":[{"lang":"en","value":"The XML‑RPC API addUser method has a validation bypass introduced in the fix for CVE‑2025‑55129. As a result, API users could create usernames that enabled impersonation or stored XSS attacks. Proper validation has been added where it was missing."}],"metrics":[{"cvssV3_0":{"baseScore":0,"baseSeverity":"NONE","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","version":"3.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-287","description":"CWE-287 Improper Authentication - Generic","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-06-23T16:14:38.126Z","orgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","shortName":"hackerone"},"references":[{"url":"https://hackerone.com/reports/3680090"}]}},"cveMetadata":{"assignerOrgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","assignerShortName":"hackerone","cveId":"CVE-2026-44961","datePublished":"2026-06-23T16:14:38.126Z","dateReserved":"2026-05-08T15:00:02.447Z","dateUpdated":"2026-06-23T17:44:07.348Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-23 17:17:00","lastModifiedDate":"2026-06-23 18:17:52","problem_types":["CWE-287","CWE-287 CWE-287 Improper Authentication - Generic"],"metrics":{"cvssMetricV30":[{"source":"support@hackerone.com","type":"Secondary","cvssData":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N","baseScore":0,"baseSeverity":"NONE","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":0}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-06-23T17:32:45.247422Z","id":"CVE-2026-44961","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"44961","Ordinal":"1","Title":"CVE-2026-44961","CVE":"CVE-2026-44961","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"44961","Ordinal":"1","NoteData":"The XML‑RPC API addUser method has a validation bypass introduced in the fix for CVE‑2025‑55129. As a result, API users could create usernames that enabled impersonation or stored XSS attacks. Proper validation has been added where it was missing.","Type":"Description","Title":"CVE-2026-44961"}]}}}