Security advisory

{
  "id": "6b789309f2e6e8f496b5d9b09f241f6e6ef1a18a7f701f132aa5acf996b8af5c",
  "url": "https://osv.dev/vulnerability/CVE-2021-29435",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-29435",
    "summary": "trestle-auth is an authentication plugin for the Trestle admin framework. A vulnerability in trestle-auth versions 0.4.0 and 0.4.1 allows an attacker to create a form that will bypass Rails' built-in CSRF protection when submitted by a victim with a trestle-auth admin session. This potentially allows an attacker to alter protected data, including admin account credentials. The vulnerability has been fixed in trestle-auth 0.4.2 released to RubyGems.",
    "evidence": "osv:CVE-2021-29435",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-29435",
      "aliases": [
        "CVE-2021-29435",
        "GHSA-h8hx-2c5r-32cf"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/trestleadmin/trestle-auth",
              "type": "GIT",
              "events": [
                {
                  "introduced": "e57cda555a25caf4f6c02bd122cf07cf4b4c7b7a"
                },
                {
                  "last_affected": "71d7f3d9f32d2f2cae385a9d9beb397a142b9203"
                },
                {
                  "fixed": "cb95b05cdb2609052207af07b4b8dfe3a23c11dc"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:trestle-auth_project:trestle-auth:0.4.0:*:*:*:*:ruby:*:*",
                    "range": [
                      {
                        "introduced": "0.4.0"
                      },
                      {
                        "last_affected": "0.4.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:trestle-auth_project:trestle-auth:0.4.1:*:*:*:*:ruby:*:*",
                    "range": [
                      {
                        "introduced": "0.4.1"
                      },
                      {
                        "last_affected": "0.4.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "cb95b05cdb2609052207af07b4b8dfe3a23c11dc"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.4.0",
            "0.4.1",
            "v0.4.1",
            "v0.4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29435.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:43.039344991Z",
      "provider": "osv",
      "references": [
        "https://github.com/TrestleAdmin/trestle-auth/security/advisories/GHSA-h8hx-2c5r-32cf",
        "https://rubygems.org/gems/trestle-auth",
        "https://github.com/TrestleAdmin/trestle-auth/commit/cb95b05cdb2609052207af07b4b8dfe3a23c11dc"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-29435",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384534,
  "published_at": "2021-04-13T20:15:21.907+00:00"
}