{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.9.9"
              },
              {
                "last_affected": "1.0.0-alpha.3"
              },
              {
                "fixed": "1.0.0-alpha.3"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "a30429fbf157033804430a287cb3c71ec744daef"
            },
            {
              "fixed": "aea4ead8c449ea5517ed53b6dcbd28b0a528ad9d"
            }
          ],
          "repo": "https://github.com/flextype/flextype",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89145.json"
  },
  "details": "Flextype CMS versions 0.9.9 through 1.0.0-alpha.3 fail to HTML-escape plugin directory names in the dependency error page rendered by getValidPluginsDependencies(). Attackers with write access to the plugins directory can create a plugin with HTML characters in its name to execute arbitrary scripts in users' browsers when dependency validation fails.",
  "id": "CVE-2026-89145",
  "modified": "2026-09-13T03:30:51.731715471Z",
  "published": "2026-09-11T01:14:20.554Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89145.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89145"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/flextype-cms-0.9.9-through-1.0.0-alpha.3-stored-xss-via-plugin-directory"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/flextype/flextype/issues/597"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/flextype/flextype"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/flextype/flextype/blob/aea4ead8c449ea5517ed53b6dcbd28b0a528ad9d/src/flextype/core/Plugins.php#L345"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Flextype CMS 0.9.9 through 1.0.0-alpha.3 Stored XSS via Plugin Directory"
}