GHSA-92HR-GMR6-H8CP

Vulnerability from github – Published: 2026-08-17 17:49 – Updated: 2026-08-17 17:49
VLAI
Summary
Etherpad addressed weak token RNG, login timing, plugin path handling, API request handling
Details

Fix: PR #7906 (ether/etherpad). A set of medium/low hardening fixes:

  • Weak RNG for tokens (CWE-330): author/session/readonly IDs were generated with Math.random() (client and server). Now use crypto.getRandomValues.
  • Login timing / no failure delay (CWE-208/CWE-307): the OIDC interaction login used a non-constant-time password compare with no failure delay. Now uses crypto.timingSafeEqual plus a uniform failure delay; user lookup is own-property only.
  • Plugin dependency path handling (CWE-22): plugin dependency names from package.json were used to build filesystem paths without validation (admin-gated install). Now validated against the npm name grammar.
  • API parameter pollution (CWE-235): /api/2 merged all request headers into the API field set. Now forwards only authorization, matching the openapi.ts handler.
  • Pad-creation side effect: API.appendChatMessage could create arbitrary pads (missing getPadSafe). Now requires the pad to exist.
  • Error info disclosure (CWE-209): the admin file server echoed filesystem error detail; now returns a generic message.
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.8.14"
      },
      "package": {
        "ecosystem": "npm",
        "name": "ep_etherpad-lite"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-208",
      "CWE-209",
      "CWE-22",
      "CWE-235",
      "CWE-330"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-17T17:49:21Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "Fix: PR #7906 (ether/etherpad). A set of medium/low hardening fixes:\n\n- **Weak RNG for tokens (CWE-330):** author/session/readonly IDs were generated with `Math.random()` (client and server). Now use `crypto.getRandomValues`.\n- **Login timing / no failure delay (CWE-208/CWE-307):** the OIDC interaction login used a non-constant-time password compare with no failure delay. Now uses `crypto.timingSafeEqual` plus a uniform failure delay; user lookup is own-property only.\n- **Plugin dependency path handling (CWE-22):** plugin dependency names from package.json were used to build filesystem paths without validation (admin-gated install). Now validated against the npm name grammar.\n- **API parameter pollution (CWE-235):** `/api/2` merged all request headers into the API field set. Now forwards only `authorization`, matching the openapi.ts handler.\n- **Pad-creation side effect:** `API.appendChatMessage` could create arbitrary pads (missing `getPadSafe`). Now requires the pad to exist.\n- **Error info disclosure (CWE-209):** the admin file server echoed filesystem error detail; now returns a generic message.",
  "id": "GHSA-92hr-gmr6-h8cp",
  "modified": "2026-08-17T17:49:21Z",
  "published": "2026-08-17T17:49:21Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ether/etherpad/security/advisories/GHSA-92hr-gmr6-h8cp"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ether/etherpad/pull/7906"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ether/etherpad/commit/7ea99706483443239bbbc0f2df9aff8ab5de4805"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ether/etherpad"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ether/etherpad/releases/tag/3.3.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Etherpad addressed weak token RNG, login timing, plugin path handling, API request handling"
}



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