Security advisory

{
  "id": "4dba0b9fae63bd58bedf13d78d0af438d547db78334d4d5b298e5582d6bf3be9",
  "url": "https://osv.dev/vulnerability/CVE-2018-7644",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-7644",
    "summary": "The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp before 1.15.3 incorrectly verifies signatures on SAML assertions, allowing a remote attacker to construct a crafted SAML assertion on behalf of an Identity Provider that would pass as cryptographically valid, thereby allowing them to impersonate a user from that Identity Provider, aka a key confusion issue.",
    "evidence": "osv:CVE-2018-7644",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-7644",
      "aliases": [
        "CVE-2018-7644",
        "GHSA-923w-2xv2-7pr8"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/simplesamlphp/simplesamlphp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1cba48676420d7889ba8223d4f2ea1b9867c0184"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.15.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.15.2",
            "v1.15.1",
            "v1.15.0",
            "v1.15.0-rc3",
            "v1.15.0-rc2",
            "v1.15.0-rc1",
            "v1.12.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-7644.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:16.564881828Z",
      "provider": "osv",
      "references": [
        "https://simplesamlphp.org/security/201802-01"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "simplesamlphp:simplesamlphp",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "1.15.3"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2018-7644",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 429370,
  "published_at": "2018-03-05T14:29:00.377+00:00"
}