FKIE_CVE-2026-30913

Vulnerability from fkie_nvd - Published: 2026-03-10 17:40 - Updated: 2026-03-11 13:53
Severity ?
4.6 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Summary
Flarum is open-source forum software. When the flarum/nicknames extension is enabled, a registered user can set their nickname to a string that email clients interpret as a hyperlink. The nickname is inserted verbatim into plain-text notification emails, and recipients may be misled into visiting attacker-controlled domains.
References
security-advisories@github.comhttps://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25
security-advisories@github.comhttps://github.com/flarum/nicknames/commit/4dde99729abdce8f6e2a7437c86e38735fdcca28
security-advisories@github.comhttps://github.com/flarum/nicknames/releases/tag/v1.8.
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Flarum is open-source forum software. When the flarum/nicknames extension is enabled, a registered user can set their nickname to a string that email clients interpret as a hyperlink. The nickname is inserted verbatim into plain-text notification emails, and recipients may be misled into visiting attacker-controlled domains."
    },
    {
      "lang": "es",
      "value": "Flarum es un software de foro de c\u00f3digo abierto. Cuando la extensi\u00f3n flarum/nicknames est\u00e1 habilitada, un usuario registrado puede establecer su apodo a una cadena que los clientes de correo electr\u00f3nico interpretan como un hiperv\u00ednculo. El apodo se inserta textualmente en los correos electr\u00f3nicos de notificaci\u00f3n de texto sin formato, y los destinatarios pueden ser enga\u00f1ados para que visiten dominios controlados por el atacante."
    }
  ],
  "id": "CVE-2026-30913",
  "lastModified": "2026-03-11T13:53:47.157",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.6,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 2.5,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-10T17:40:15.210",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/flarum/nicknames/commit/4dde99729abdce8f6e2a7437c86e38735fdcca28"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/flarum/nicknames/releases/tag/v1.8."
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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