{
  "id": "cve-2021-26829",
  "cveID": "CVE-2021-26829",
  "vendor": "OpenPLC",
  "product": "ScadaBR",
  "vulnerabilityName": "OpenPLC ScadaBR Cross-site Scripting Vulnerability",
  "shortDescription": "OpenPLC ScadaBR contains a cross-site scripting vulnerability via system_settings.shtm.",
  "requiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
  "dateAdded": "2025-11-28",
  "dueDate": "2025-12-19",
  "knownRansomware": false,
  "cwes": [
    "CWE-79"
  ],
  "notes": "This vulnerability could affect an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://github.com/SCADA-LTS/Scada-LTS/pull/3211 ; https://nvd.nist.gov/vuln/detail/CVE-2021-26829",
  "sources": [
    {
      "label": "NVD",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-26829"
    },
    {
      "label": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog"
    },
    {
      "label": "github.com",
      "url": "https://github.com/SCADA-LTS/Scada-LTS/pull/3211"
    },
    {
      "label": "nvd.nist.gov",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-26829"
    }
  ],
  "cvss": {
    "score": 5.4,
    "severity": "MEDIUM",
    "version": "3.1",
    "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
  },
  "epss": {
    "score": 0.4805,
    "percentile": 0.9878
  },
  "timeline": [
    {
      "date": "2025-11-28",
      "event": "Added to the CISA KEV catalog"
    },
    {
      "date": "2025-12-19",
      "event": "CISA remediation due date (BOD 22-01)"
    }
  ],
  "status": "past due"
}