Security advisory

{
  "id": "5f07dd25e764fa4a90bc1e16de8c6601b18b9a6644f6139bc0ec753e3d2c0163",
  "url": "https://osv.dev/vulnerability/CVE-2019-25025",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-25025",
    "summary": "The activerecord-session_store (aka Active Record Session Store) component through 1.1.3 for Ruby on Rails does not use a constant-time approach when delivering information about whether a guessed session ID is valid. Consequently, remote attackers can leverage timing discrepancies to achieve a correct guess in a relatively short amount of time. This is a related issue to CVE-2019-16782.",
    "evidence": "osv:CVE-2019-25025",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2019-25025",
      "aliases": [
        "CVE-2019-25025",
        "GHSA-cvw2-xj8r-mjf7"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/rails/activerecord-session_store",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "50e81319339d847a07a67eb32d77dbbbe4636317"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:rubyonrails:active_record_session_store:*:*:*:*:*:ruby_on_rails:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.1.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.1.3",
            "v1.1.2",
            "v1.1.1",
            "v1.1.0",
            "v1.0.0",
            "v1.0.0.pre",
            "v0.1.2",
            "v0.1.1",
            "v0.1.0",
            "v0.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-25025.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:54.821402619Z",
      "provider": "osv",
      "references": [
        "https://github.com/rails/activerecord-session_store/pull/151"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-25025",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 382343,
  "published_at": "2021-03-05T06:15:12.69+00:00"
}