{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:textpattern:textpattern:4.9.0:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "4.9.0"
              },
              {
                "last_affected": "4.9.0"
              }
            ],
            "source": "CPE_STRING"
          },
          "events": [
            {
              "introduced": "61f5e46ffa39394b0af15be3fcf2102be06816a9"
            },
            {
              "last_affected": "61f5e46ffa39394b0af15be3fcf2102be06816a9"
            }
          ],
          "repo": "https://github.com/textpattern/textpattern",
          "type": "GIT"
        }
      ],
      "versions": [
        "4.9.0"
      ]
    }
  ],
  "database_specific": {},
  "details": "A persistent cross-site scripting vulnerability was discovered in the Excerpt parameter in Textpattern CMS 4.9.0 which allows remote attackers to execute arbitrary code via a crafted payload entered into the URL field. The vulnerability is triggered by users visiting the 'Articles' page.",
  "id": "CVE-2021-28002",
  "modified": "2026-07-08T05:37:03.412403959Z",
  "published": "2021-08-19T14:39:31.757Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.linkedin.com/in/tushar-vaidya-2111s5/"
    },
    {
      "type": "EVIDENCE",
      "url": "https://www.exploit-db.com/exploits/49617"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}