{"api_version":"1","generated_at":"2026-04-21T09:13:45+00:00","cve":"CVE-2023-28357","urls":{"html":"https://cve.report/CVE-2023-28357","api":"https://cve.report/api/cve/CVE-2023-28357.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-28357","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-28357"},"summary":{"title":"CVE-2023-28357","description":"A vulnerability has been identified in Rocket.Chat, where the ACL checks in the Slash Command /mute occur after checking whether a user is a member of a given channel, leaking private channel members to unauthorized users. This allows authenticated users to enumerate whether a username is a member of a channel that they do not have access to.","state":"PUBLIC","assigner":"support@hackerone.com","published_at":"2023-05-11 22:15:00","updated_at":"2023-05-22 14:29:00"},"problem_types":["CWE-200"],"metrics":[],"references":[{"url":"https://hackerone.com/reports/1445810","name":"https://hackerone.com/reports/1445810","refsource":"MISC","tags":[],"title":"HackerOne","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-28357","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-28357","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"28357","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"rocket.chat","cpe5":"rocket.chat","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2023-28357","ASSIGNER":"support@hackerone.com","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"n/a","product":{"product_data":[{"product_name":"Rocket.Chat","version":{"version_data":[{"version_value":"This issue has been fixed in version 6.0> and is backported for the supported versions. Check this document for more info: https://docs.rocket.chat/resources/get-support/enterprise-support#rocket.chat-versions"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Information Disclosure (CWE-200)"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://hackerone.com/reports/1445810","url":"https://hackerone.com/reports/1445810"}]},"description":{"description_data":[{"lang":"eng","value":"A vulnerability has been identified in Rocket.Chat, where the ACL checks in the Slash Command /mute occur after checking whether a user is a member of a given channel, leaking private channel members to unauthorized users. This allows authenticated users to enumerate whether a username is a member of a channel that they do not have access to."}]}},"nvd":{"publishedDate":"2023-05-11 22:15:00","lastModifiedDate":"2023-05-22 14:29:00","problem_types":["CWE-200"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.8,"impactScore":1.4}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:*","versionEndExcluding":"6.0.0","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}