Security advisory

{
  "id": "ab5f4adf0b6a6d791f9a96f09fc015d82de0a2d8ca551909f2f79c2d7b88e07a",
  "url": "https://osv.dev/vulnerability/CVE-2020-6583",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-6583",
    "summary": "BigProf Online Invoicing System (OIS) through 2.6 has XSS that can be leveraged for session hijacking. An attacker can exploit the XSS vulnerability, retrieve the session cookie from the administrator login, and take over the administrator account via the Name field in an Add New Client action.",
    "evidence": "osv:CVE-2020-6583",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-6583",
      "aliases": [
        "CVE-2020-6583"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/bigprof-software/online-invoicing-system",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "5550ad6bb16cbcd33c4eb6d22b7adc5b45e33b42"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:bigprof:online_invoicing_system:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.6",
            "2.5",
            "2.4",
            "2.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-6583.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:55.533393450Z",
      "provider": "osv",
      "references": [
        "https://www.sevenlayers.com/index.php/282-online-invoicing-system-2-6-xss-session-hijack"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-6583",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 438440,
  "published_at": "2020-01-08T20:15:13.03+00:00"
}