GCVE-1-2026-20217 (CVE-2026-81814)

Vulnerability from gna-1 – Published: 2026-08-27 12:48 – Updated: 2026-08-27 12:48
VLAI
Title
Flowintel Stored XSS in Calendar via Malicious Case Title
Summary
Affected versions of Flowintel render calendar event titles using innerHTML. Because those titles are derived from case titles, a user able to create or modify a case title could store HTML or script-capable content that is later interpreted by the browser when another user views the calendar. The fix changes: titleEl.innerHTML = arg.event.title to: titleEl.textContent = arg.event.title || '' and similarly stops using innerHTML for the static download icon. Version impacted =>3.3.0
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version CPE status
flowintel flowintel Affected: 0 , ≤ 3.3.0 (semver)
guessed Create a notification for this product.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "flowintel",
          "repo": "https://github.com/flowintel/flowintel",
          "vendor": "flowintel",
          "versions": [
            {
              "lessThanOrEqual": "3.3.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Jeroen Pinoy"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "David Cruciani"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003ch3\u003e\u003c/h3\u003e\n\u003cp\u003eAffected versions of Flowintel render calendar event titles using \u003ccode\u003einnerHTML\u003c/code\u003e. Because those titles are derived from case titles, a user able to create or modify a case title could store HTML or script-capable content that is later interpreted by the browser when another user views the calendar.\u003c/p\u003e\n\u003cp\u003eThe fix changes:\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003etitleEl.innerHTML = arg.event.title\u003c/code\u003e\u003c/p\u003e\n\u003cp\u003eto:\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003etitleEl.textContent = arg.event.title || \u0027\u0027\u003c/code\u003e\u003c/p\u003e\u003cp\u003eand similarly stops using \u003ccode\u003einnerHTML\u003c/code\u003e for the static download icon.\u003c/p\u003eVersion impacted =\u0026gt;3.3.0"
            }
          ],
          "value": "Affected versions of Flowintel render calendar event titles using innerHTML. Because those titles are derived from case titles, a user able to create or modify a case title could store HTML or script-capable content that is later interpreted by the browser when another user views the calendar.\n\n\nThe fix changes:\n\n\ntitleEl.innerHTML = arg.event.title\n\n\nto:\n\n\ntitleEl.textContent = arg.event.title || \u0027\u0027\n\nand similarly stops using innerHTML for the static download icon.\n\nVersion impacted =\u003e3.3.0"
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-63",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-63 Cross-Site Scripting (XSS)"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "orgId": "00000000-0000-4000-9000-000000000000"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/flowintel/flowintel/commit/f224438eb495e6b0d4e465eb7f40ab771bbfdb76.patch"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Flowintel Stored XSS in Calendar via Malicious Case Title",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "00000000-0000-4000-9000-000000000000",
    "cveId": "CVE-2026-81814",
    "datePublished": "2026-08-27T12:48:30.757073Z",
    "dateReserved": "2026-08-27T12:48:37.284Z",
    "dateUpdated": "2026-08-27T12:48:37.357461Z",
    "requesterUserId": "00000000-0000-4000-9000-000000000000",
    "serial": 1,
    "state": "PUBLISHED",
    "vulnId": "gcve-1-2026-20217"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}



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