FKIE_CVE-2026-40590

Vulnerability from fkie_nvd - Published: 2026-04-21 17:16 - Updated: 2026-04-22 21:10
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Summary
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the Change Customer modal exposes a “Create a new customer” flow via POST /customers/ajax with action=create. Under limited visibility, the endpoint drops unique-email validation. If the supplied email already belongs to a hidden customer, Customer::create() reuses that hidden customer object and fills empty profile fields from attacker-controlled input. Version 1.8.214 fixes the vulnerability.
References
security-advisories@github.comhttps://github.com/freescout-help-desk/freescout/commit/b3d7611e6e173ed8a5e525b791deb6b32cf1ce62
security-advisories@github.comhttps://github.com/freescout-help-desk/freescout/releases/tag/1.8.214
security-advisories@github.comhttps://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wjw4-8xg6-342m
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wjw4-8xg6-342m
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the Change Customer modal exposes a \u201cCreate a new customer\u201d flow via POST /customers/ajax with action=create. Under limited visibility, the endpoint drops unique-email validation. If the supplied email already belongs to a hidden customer, Customer::create() reuses that hidden customer object and fills empty profile fields from attacker-controlled input. Version 1.8.214 fixes the vulnerability."
    }
  ],
  "id": "CVE-2026-40590",
  "lastModified": "2026-04-22T21:10:14.290",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-21T17:16:56.803",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/freescout-help-desk/freescout/commit/b3d7611e6e173ed8a5e525b791deb6b32cf1ce62"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/freescout-help-desk/freescout/releases/tag/1.8.214"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wjw4-8xg6-342m"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-wjw4-8xg6-342m"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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