FKIE_CVE-2026-31876

Vulnerability from fkie_nvd - Published: 2026-03-11 19:16 - Updated: 2026-03-16 20:54
Severity ?
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Summary
Notesnook is a note-taking app focused on user privacy & ease of use. Prior to 3.3.9, a Stored Cross-Site Scripting (XSS) vulnerability existed in Notesnook's editor embed component when rendering Twitter/X embed URLs. The tweetToEmbed() function in component.tsx interpolated the user-supplied URL directly into an HTML string without escaping, which was then assigned to the srcdoc attribute of an <iframe>. This vulnerability is fixed in 3.3.9.
References
security-advisories@github.comhttps://github.com/streetwriters/notesnook/commit/e87f5e5f899f45df28d7c0f33f15e9178d1fbcb7Patch
security-advisories@github.comhttps://github.com/streetwriters/notesnook/security/advisories/GHSA-jprx-2w2h-4rh5Vendor Advisory
Impacted products
Vendor Product Version
streetwriters notesnook_desktop *
streetwriters notesnook_mobile *
streetwriters notesnook_mobile *
To clipboard 

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    {
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              "versionEndExcluding": "3.3.9",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Notesnook is a note-taking app focused on user privacy \u0026 ease of use. Prior to 3.3.9, a Stored Cross-Site Scripting (XSS) vulnerability existed in Notesnook\u0027s editor embed component when rendering Twitter/X embed URLs. The tweetToEmbed() function in component.tsx interpolated the user-supplied URL directly into an HTML string without escaping, which was then assigned to the srcdoc attribute of an \u003ciframe\u003e. This vulnerability is fixed in 3.3.9."
    },
    {
      "lang": "es",
      "value": "Notesnook es una aplicaci\u00f3n para tomar notas centrada en la privacidad del usuario y la facilidad de uso. Previo a la 3.3.9, exist\u00eda una vulnerabilidad de cross-site scripting (XSS) almacenado en el componente de incrustaci\u00f3n del editor de Notesnook al renderizar URLs de incrustaci\u00f3n de Twitter/X. La funci\u00f3n tweetToEmbed() en component.tsx interpolaba la URL proporcionada por el usuario directamente en una cadena HTML sin escapar, la cual se asignaba luego al atributo srcdoc de un . Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 3.3.9."
    }
  ],
  "id": "CVE-2026-31876",
  "lastModified": "2026-03-16T20:54:45.300",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 2.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-11T19:16:04.140",
  "references": [
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      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/streetwriters/notesnook/commit/e87f5e5f899f45df28d7c0f33f15e9178d1fbcb7"
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  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
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          "value": "CWE-79"
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      "source": "security-advisories@github.com",
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