{
    "id": "CVE-2021-26829",
    "published": "2021-06-11 12:15:12",
    "last_modified": "2026-06-17 03:43:50",
    "cvss_score": "5.4",
    "cvss_severity": "MEDIUM",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
    "cwe": "CWE-79",
    "description": "OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via system_settings.shtm.",
    "epss_score": "0.48050",
    "epss_percentile": "0.98817",
    "kev": 1,
    "kev_due": "2025-12-19",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:27:39",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2025-12-19."
    },
    "products": [
        {
            "vendor": "linux",
            "product": "linux_kernel"
        },
        {
            "vendor": "microsoft",
            "product": "windows"
        },
        {
            "vendor": "scadabr",
            "product": "scadabr"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2021-26829",
        "date_added": "2025-11-28",
        "due_date": "2025-12-19",
        "vendor": "OpenPLC",
        "product": "ScadaBR",
        "name": "OpenPLC ScadaBR Cross-site Scripting Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4",
        "https://youtu.be/Xh6LPCiLMa8",
        "http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4",
        "https://youtu.be/Xh6LPCiLMa8",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26829",
        "https://www.forescout.com/blog/anatomy-of-a-hacktivist-attack-russian-aligned-group-targets-otics/"
    ]
}