Security advisory

{
  "id": "dd8acae8c89694f442fc01d9c4a3d780066b5d3ca522bd8ad347151ca4130421",
  "url": "https://osv.dev/vulnerability/CVE-2020-18663",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-18663",
    "summary": "Cross Site Scripting (XSS) vulnerability in gnuboard5 <=v5.3.2.8 via the act parameter in bbs/move_update.php.",
    "evidence": "osv:CVE-2020-18663",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-18663",
      "aliases": [
        "CVE-2020-18663"
      ],
      "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/gnuboard/gnuboard5",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "831219e2c233b2d721a049b7aeb054936d000dc2"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:sir:gnuboard:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "5.3.2.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "5.3.2.8",
            "5.3.2.6",
            "5.3.2.5",
            "5.3.2.4",
            "5.3.2.3",
            "5.3.2.2",
            "5.3.2.1",
            "5.3.2.0",
            "5.3.1.9",
            "5.3.1.8",
            "5.3.1.7",
            "5.3.1.6",
            "5.3.1.4",
            "5.3.1.3",
            "5.3.1.2",
            "5.3.1",
            "5.2.9.8.4",
            "5.2.9.8.3",
            "5.2.9.8.1",
            "5.2.9.8",
            "5.2.9.7",
            "5.2.9.6",
            "5.2.9.5",
            "5.2.9.3",
            "5.2.9.2",
            "5.2.9",
            "5.2.8",
            "5.2.6",
            "5.2.5",
            "5.2.4",
            "5.2.3",
            "5.2.2",
            "5.2.1",
            "5.2.0",
            "5.1.19",
            "5.1.18",
            "5.1.17",
            "5.1.16",
            "5.1.15",
            "5.1.14",
            "5.1.13",
            "5.1.12",
            "5.1.11",
            "5.1.10",
            "5.1.9",
            "5.1.8",
            "5.1.7",
            "5.1.6",
            "5.1.5",
            "5.1.4",
            "5.1.3",
            "5.1.2",
            "5.1.1",
            "5.1.0",
            "5.0.42",
            "5.0.41",
            "5.0.39",
            "5.0.38",
            "5.0.37",
            "5.0.36",
            "5.0.35",
            "5.0.34",
            "5.0.33",
            "5.0.32",
            "5.0.31",
            "5.0.30",
            "5.0.29",
            "5.0.28",
            "5.0.27",
            "5.0.26",
            "5.0.25",
            "5.0.24",
            "5.0.23",
            "5.0.22",
            "5.0.21",
            "5.0.20",
            "5.0.18",
            "5.0.17",
            "5.0.16",
            "5.0.15",
            "5.0.14",
            "5.0.13",
            "5.0.12",
            "5.0.11",
            "5.0.10",
            "5.0.9",
            "5.0.8",
            "5.0.5",
            "5.0.4",
            "5.0.3",
            "5.0.2",
            "5.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-18663.json"
          }
        }
      ],
      "modified": "2026-10-24T10:47:48.149739214Z",
      "provider": "osv",
      "references": [
        "https://github.com/gnuboard/gnuboard5/issues/43",
        "https://www.seebug.org/vuldb/ssvid-97926",
        "https://github.com/LoRexxar/CVE_Request/tree/master/gnuboard5%20mul%20vuls%20before%20v5.3.2.8#reflective-xss-in-bbsmove_updatephp"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:sir:gnuboard:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "sir:gnuboard",
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "5.3.2.8"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-18663",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 441557,
  "published_at": "2021-06-24T16:15:08.197+00:00"
}