{
  "id": "CVE-2023-28357",
  "sourceIdentifier": "support@hackerone.com",
  "published": "2023-05-11T22:15:09.940",
  "lastModified": "2023-05-22T14:29:54.037",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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."
    }
  ],
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        "type": "Primary",
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          "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
      }
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  },
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          "value": "CWE-200"
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      "source": "support@hackerone.com",
      "type": "Secondary",
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          "lang": "en",
          "value": "CWE-200"
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  "references": [
    {
      "url": "https://hackerone.com/reports/1445810",
      "source": "support@hackerone.com",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ]
    }
  ]
}