{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.8.3"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "f07336e204aef7876170174865e0b04c0ee7d16d"
            }
          ],
          "repo": "https://github.com/flarum/framework",
          "type": "GIT"
        }
      ]
    },
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4dde99729abdce8f6e2a7437c86e38735fdcca28"
            }
          ],
          "repo": "https://github.com/flarum/nicknames",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-3c4m-j3g4-hh25"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30913.json"
  },
  "details": "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.",
  "id": "CVE-2026-30913",
  "modified": "2026-04-01T23:07:46.596484401Z",
  "published": "2026-03-09T22:42:40.014Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/flarum/nicknames/releases/tag/v1.8."
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30913.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30913"
    },
    {
      "type": "FIX",
      "url": "https://github.com/flarum/nicknames/commit/4dde99729abdce8f6e2a7437c86e38735fdcca28"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "flarum/nickname: Display name injection in notification emails (autolink \u0026 markdown)"
}