{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "freescout",
          "vendor": "freescout-help-desk",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.8.220"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "FreeScout is a free help desk and shared inbox built with PHP\u0027s Laravel framework. Prior to 1.8.220, the email processing pipeline in FreeScout\u0027s FetchEmails command has two code paths for identifying agent (user) replies based on In-Reply-To / References headers. The notification reply path (notify-{thread_id}-{user_id}-...) extracts thread_id and user_id directly from the Message-ID without HMAC verification. An external attacker who can spoof the From address of a helpdesk agent can inject messages that FreeScout processes as legitimate agent replies \u2014 which are then automatically forwarded to customers via the legitimate SMTP server. This vulnerability is fixed in 1.8.220."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-290",
              "description": "CWE-290: Authentication Bypass by Spoofing",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-345",
              "description": "CWE-345: Insufficient Verification of Data Authenticity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-29T19:51:41.383Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6r38-6mcf-2ww3",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6r38-6mcf-2ww3"
        },
        {
          "name": "https://github.com/freescout-help-desk/freescout/commit/d902f19038213c6a376947d269b00440908e88a0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/freescout-help-desk/freescout/commit/d902f19038213c6a376947d269b00440908e88a0"
        }
      ],
      "source": {
        "advisory": "GHSA-6r38-6mcf-2ww3",
        "discovery": "UNKNOWN"
      },
      "title": "FreeScout: Agent Impersonation via Missing HMAC Verification on Notification Reply Message-ID Path"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-47123",
    "datePublished": "2026-05-29T19:51:41.383Z",
    "dateReserved": "2026-05-18T19:50:18.694Z",
    "dateUpdated": "2026-05-29T19:51:41.383Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-47123\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-05-29T20:16:28.380\",\"lastModified\":\"2026-05-29T20:21:38.773\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"FreeScout is a free help desk and shared inbox built with PHP\u0027s Laravel framework. Prior to 1.8.220, the email processing pipeline in FreeScout\u0027s FetchEmails command has two code paths for identifying agent (user) replies based on In-Reply-To / References headers. The notification reply path (notify-{thread_id}-{user_id}-...) extracts thread_id and user_id directly from the Message-ID without HMAC verification. An external attacker who can spoof the From address of a helpdesk agent can inject messages that FreeScout processes as legitimate agent replies \u2014 which are then automatically forwarded to customers via the legitimate SMTP server. This vulnerability is fixed in 1.8.220.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.2,\"impactScore\":4.7}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-290\"},{\"lang\":\"en\",\"value\":\"CWE-345\"}]}],\"references\":[{\"url\":\"https://github.com/freescout-help-desk/freescout/commit/d902f19038213c6a376947d269b00440908e88a0\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6r38-6mcf-2ww3\",\"source\":\"security-advisories@github.com\"}]}}"
  }
}