Inadequate validation of SSO redirect credentials permits credential theft

{
  "id": "a564c86255c3acfda19bff96e189ecb18dc8eb97e77ad14aa7b9f23590ee3b0c",
  "url": "https://osv.dev/vulnerability/CVE-2025-59480",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Inadequate validation of SSO redirect credentials permits credential theft",
    "summary": "Mattermost Mobile Apps versions <=2.32.0 fail to verify that SSO redirect tokens originate from the trusted server, which allows a malicious Mattermost instance or on-path attacker to obtain user session credentials via crafted token-in-URL responses",
    "evidence": "osv:CVE-2025-59480",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-59480",
      "aliases": [
        "CVE-2025-59480"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mattermost/mattermost-mobile",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "6f194a099a20ae4b40a94c373b6ba981247a77bf"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mattermost:mattermost_mobile:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.33.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-59480.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:44.205203015Z",
      "provider": "osv",
      "references": [
        "https://mattermost.com/security-updates",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/59xxx/CVE-2025-59480.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-59480"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-352"
        ],
        "cna_assigner": "Mattermost",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "2.32.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/59xxx/CVE-2025-59480.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-59480",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 512378,
  "published_at": "2025-11-13T17:32:04.772+00:00"
}