FKIE_CVE-2026-40565

Vulnerability from fkie_nvd - Published: 2026-04-21 16:16 - Updated: 2026-04-22 17:34
Severity ?
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's linkify() function in app/Misc/Helper.php converts plain-text URLs in email bodies into HTML anchor tags without escaping double-quote characters (") in the URL. HTMLPurifier (called first via getCleanBody()) preserves literal " characters in text nodes. linkify() then wraps URLs including those " chars inside an unescaped href="..." attribute, breaking out of the href and injecting arbitrary HTML attributes. Version 1.8.213 fixes the issue.
References
security-advisories@github.comhttps://github.com/freescout-help-desk/freescout/commit/265379b3ae343f06846adc0aa8510643d1eac2dfPatch
security-advisories@github.comhttps://github.com/freescout-help-desk/freescout/releases/tag/1.8.213Release Notes
security-advisories@github.comhttps://github.com/freescout-help-desk/freescout/security/advisories/GHSA-49pm-xwqj-vwjpVendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-49pm-xwqj-vwjpVendor Advisory
Impacted products
Vendor Product Version
freescout freescout *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:freescout:freescout:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EA97ED0A-4886-4583-9D20-47BE39C40B01",
              "versionEndExcluding": "1.8.213",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout\u0027s linkify() function in app/Misc/Helper.php converts plain-text URLs in email bodies into HTML anchor tags without escaping double-quote characters (\") in the URL. HTMLPurifier (called first via getCleanBody()) preserves literal \" characters in text nodes. linkify() then wraps URLs including those \" chars inside an unescaped href=\"...\" attribute, breaking out of the href and injecting arbitrary HTML attributes. Version 1.8.213 fixes the issue."
    }
  ],
  "id": "CVE-2026-40565",
  "lastModified": "2026-04-22T17:34:32.643",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-21T16:16:20.390",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/freescout-help-desk/freescout/commit/265379b3ae343f06846adc0aa8510643d1eac2df"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/freescout-help-desk/freescout/releases/tag/1.8.213"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-49pm-xwqj-vwjp"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-49pm-xwqj-vwjp"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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