Security advisory

{
  "id": "a54adc6067043ff678d50d5baaa298d91aba22b1d93f2b12c73dc1f88aced080",
  "url": "https://osv.dev/vulnerability/CVE-2023-29867",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2023-29867",
    "summary": "Zammad 5.3.x (Fixed 5.4.0) is vulnerable to Incorrect Access Control. An authenticated attacker could gain information about linked accounts of users involved in their tickets using the Zammad API.",
    "evidence": "osv:CVE-2023-29867",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-29867",
      "aliases": [
        "CVE-2023-29867"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/zammad/zammad",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0266d1733788c637012e38fc8c6de908d37174be"
                },
                {
                  "fixed": "2fb8d15c59184bac8a49d4f4e4ba499dec9b581b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.3.0"
                      },
                      {
                        "fixed": "5.4.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-29867.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.578290792Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/29xxx/CVE-2023-29867.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-29867",
        "https://zammad.com/en/advisories/zaa-2023-02"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/29xxx/CVE-2023-29867.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-29867",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521436,
  "published_at": "2023-05-02T00:00:00+00:00"
}