ApostropheCMS: Same-parent page reorder in @apostrophecms/page move() re-ranks a restricted parent's children without create authorization

{
  "id": "23af4fb9dcd39a77e24bc543ac77f9296e1913a22cc53bf8603706a5beca0a21",
  "url": "https://osv.dev/vulnerability/GHSA-2jrp-qc93-h2j8",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ApostropheCMS: Same-parent page reorder in @apostrophecms/page move() re-ranks a restricted parent's children without create authorization",
    "summary": "## Summary ApostropheCMS enforces per-type authorization on pages: a page type may declare `editRole` / `publishRole` (the core `@apostrophecms/archive-page` does), so a project can define restricted subtrees that only higher-privileged roles may create or edit within. The `move()` operation in the `@apostrophecms/page` module is supposed to enforce that a page may only be moved into a parent the actor has `create` rights over, the same boundary the page-insert route enforces. The destination-parent authorization check in `move()` is gated on the move being a cross-parent move (`oldParent._id !== parent._id`). A same-parent reorder (repositioning a page among its existing siblings under the same parent) short-circuits that check entirely, so an authenticated low-privileged editor who holds edit rights on one ordinary page nested under a restricted parent can reposition it and, in doing so, trigger an unguarded bulk database write that re-ranks the restricted parent's other children, documents the editor has no authorization to modify. ## Root Cause The security invariant is that mutating the sibling ordering of a restricted parent's children requires `create` authority on that parent, which is exactly what the page-insert path enforces (`insert()` throws `forbidden` when `!parent._create` before it nudges peers). The destination authorization guard in `move()` restores this boundary only for cross-parent moves: its leading conjunct is `(oldParent._id !== parent._id)`. For a s",
    "evidence": "osv:GHSA-2jrp-qc93-h2j8",
    "products": [
      {
        "name": {
          "value": "apostrophe",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.33.0",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "GHSA-2jrp-qc93-h2j8",
      "aliases": [
        "CVE-2026-113655",
        "GHSA-2jrp-qc93-h2j8"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4.33.0"
                }
              ]
            }
          ],
          "package": {
            "name": "apostrophe",
            "purl": "pkg:npm/apostrophe",
            "ecosystem": "npm"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-2jrp-qc93-h2j8/GHSA-2jrp-qc93-h2j8.json"
          }
        }
      ],
      "modified": "2026-10-20T18:15:04.520821237Z",
      "provider": "osv",
      "references": [
        "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-2jrp-qc93-h2j8",
        "https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce",
        "https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350",
        "https://github.com/apostrophecms/apostrophe",
        "https://github.com/apostrophecms/apostrophe/releases/tag/apostrophe@4.33.0"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-639",
          "CWE-862"
        ],
        "severity": "MODERATE",
        "github_reviewed": true,
        "nvd_published_at": null,
        "github_reviewed_at": "2026-10-20T18:04:11Z"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-113655",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 390136,
  "published_at": "2026-10-20T18:04:11+00:00"
}