{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:bookstackapp:bookstack:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "21.08.2"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "88bcb68fcb9ef64af5451dc64d53a7af84454d96"
            },
            {
              "fixed": "040997fdc4414776bcac06a3cbaac3b26b5e8a64"
            }
          ],
          "repo": "https://github.com/bookstackapp/bookstack",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {},
  "details": "bookstack is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
  "id": "CVE-2021-3767",
  "modified": "2026-08-07T11:31:05.659529282Z",
  "published": "2021-09-06T12:15:08.237Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/bookstackapp/bookstack/commit/040997fdc4414776bcac06a3cbaac3b26b5e8a64"
    },
    {
      "type": "FIX",
      "url": "https://huntr.dev/bounties/7ec92c85-30eb-4071-8891-6183446ca980"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}