GHSA-9C5C-5J4H-8Q2C

Vulnerability from github – Published: 2021-12-16 19:40 – Updated: 2022-08-11 18:45
VLAI?
Summary
BookStack is vulnerable to Improper Access Control.
Details

BookStack prior to version 21.11.3 is vulnerable to Improper Access Control. A logged-in user with no privileges OR guest user (if public access enabled) can access the /search/users/select AJAX endpoint meant for admins to manage audit logs, to dump all usernames existing in the Bookstack database. This can also be used to harvest email belonging to a user because BookStack also uses the code where(email, like, % . $search . %) to search for users based on email.

Severity ?
5.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "ssddanbrown/bookstack"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "21.11.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-4119"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-12-16T15:36:38Z",
    "nvd_published_at": "2021-12-15T20:15:00Z",
    "severity": "MODERATE"
  },
  "details": "BookStack prior to version 21.11.3 is vulnerable to Improper Access Control. A logged-in user with no privileges OR guest user (if public access enabled) can access the /search/users/select AJAX endpoint meant for admins to manage audit logs, to dump all usernames existing in the Bookstack database. This can also be used to harvest email belonging to a user because BookStack also uses the code where(`email`, `like`, `%` . $search . `%`) to search for users based on email.",
  "id": "GHSA-9c5c-5j4h-8q2c",
  "modified": "2022-08-11T18:45:55Z",
  "published": "2021-12-16T19:40:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-4119"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bookstackapp/bookstack/commit/e765e618547c92f4e0b46caca6fb91f0174efd99"
    },
    {
      "type": "WEB",
      "url": "https://github.com/BookStackApp/BookStack/releases/tag/v21.11.3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/bookstackapp/bookstack"
    },
    {
      "type": "WEB",
      "url": "https://huntr.dev/bounties/135f2d7d-ab0b-4351-99b9-889efac46fca"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "BookStack is vulnerable to Improper Access Control."
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.