{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:aquaplatform:revive_adserver:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "6.0.0"
              },
              {
                "last_affected": "6.0.4"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "d30dee449a2da3d687c66fc4c162ed0b3e39482c"
            },
            {
              "last_affected": "37592f9d564b248f86b8230f5bdd53bbaa852f9e"
            }
          ],
          "repo": "https://github.com/revive-adserver/revive-adserver",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "hackerone",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21663.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "6"
          },
          {
            "last_affected": "6.0.4"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "HackerOne community member Patrick Lang (7yr) has reported a reflected XSS vulnerability in the banner-acl.php script of Revive Adserver. An attacker can craft a specific URL that includes an HTML payload in a parameter. If a logged in administrator visits the URL, the HTML is sent to the browser and malicious scripts would be executed.",
  "id": "CVE-2026-21663",
  "modified": "2026-07-17T03:41:59.034307811Z",
  "published": "2026-01-20T20:48:47.974Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/3473696"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21663.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21663"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}