{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "misp",
          "repo": "https://github.com/misp/misp",
          "vendor": "misp",
          "versions": [
            {
              "lessThan": "2.5.40",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Jeroen Pinoy"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Andras Iklody"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eA stored cross-site scripting vulnerability exists in MISP when the Overmind theme is used. The \u003ccode\u003esetHomePage\u003c/code\u003e endpoint previously saved the user-controlled \u003ccode\u003epath\u003c/code\u003e value through \u003ccode\u003esetSettingInternal()\u003c/code\u003e, bypassing the normal \u003ccode\u003esetSetting()\u003c/code\u003e validation logic, including \u003ccode\u003evalidate_homepage\u003c/code\u003e, which requires homepage paths to start with \u003ccode\u003e/\u003c/code\u003e. As a result, an authenticated user could store an arbitrary homepage value, including an XSS payload.\u003c/p\u003e\u003cp\u003eThe stored value was later rendered in \u003ccode\u003eapp/View/News/index.ctp\u003c/code\u003e as the \u003ccode\u003ehref\u003c/code\u003e attribute of the \u201cContinue to homepage\u201d link without HTML escaping. This could allow execution of attacker-controlled JavaScript in the browser context of the affected MISP instance when the crafted homepage link is rendered and interacted with.\u003c/p\u003e\u003cp\u003eThe issue is fixed by always persisting the homepage setting through \u003ccode\u003esetSetting()\u003c/code\u003e, ensuring validation and access checks are applied, and by HTML-escaping the homepage value before rendering it in the news view.\u003c/p\u003e\u003cbr\u003e"
            }
          ],
          "value": "A stored cross-site scripting vulnerability exists in MISP when the Overmind theme is used. The setHomePage endpoint previously saved the user-controlled path value through setSettingInternal(), bypassing the normal setSetting() validation logic, including validate_homepage, which requires homepage paths to start with /. As a result, an authenticated user could store an arbitrary homepage value, including an XSS payload.\n\nThe stored value was later rendered in app/View/News/index.ctp as the href attribute of the \u201cContinue to homepage\u201d link without HTML escaping. This could allow execution of attacker-controlled JavaScript in the browser context of the affected MISP instance when the crafted homepage link is rendered and interacted with.\n\nThe issue is fixed by always persisting the homepage setting through setSetting(), ensuring validation and access checks are applied, and by HTML-escaping the homepage value before rendering it in the news view."
        }
      ],
      "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": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/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": {
        "dateUpdated": "2026-06-12T20:21:48.441Z",
        "orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "shortName": "CIRCL"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/MISP/MISP/commit/d4733ca5d2fcceb12abc72ec6069f2484e3b8ec2"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "MISP Overmind theme stored XSS via unvalidated homepage setting",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
    "assignerShortName": "CIRCL",
    "cveId": "CVE-2026-54393",
    "datePublished": "2026-06-12T20:21:48.441Z",
    "dateReserved": "2026-06-12T20:21:32.243Z",
    "dateUpdated": "2026-06-12T20:21:48.441Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}