FKIE_CVE-2026-21861

Vulnerability from fkie_nvd - Published: 2026-03-31 01:16 - Updated: 2026-04-01 20:29
Severity ?
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Summary
baserCMS is a website development framework. Prior to version 5.2.3, baserCMS contains an OS command injection vulnerability in the core update functionality. An authenticated administrator can execute arbitrary OS commands on the server due to improper handling of user-controlled input that is directly passed to exec() without sufficient validation or escaping. This issue has been patched in version 5.2.3.
References
security-advisories@github.comhttps://basercms.net/security/JVN_20837860Vendor Advisory
security-advisories@github.comhttps://github.com/baserproject/basercms/releases/tag/5.2.3Release Notes
security-advisories@github.comhttps://github.com/baserproject/basercms/security/advisories/GHSA-qxmc-6f24-g86gExploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/baserproject/basercms/security/advisories/GHSA-qxmc-6f24-g86gExploit, Vendor Advisory
Impacted products
Vendor Product Version
basercms basercms *
To clipboard 

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    {
      "nodes": [
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          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:basercms:basercms:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "07DEEEF3-0621-431D-8A38-405EDBD0957E",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "baserCMS is a website development framework. Prior to version 5.2.3, baserCMS contains an OS command injection vulnerability in the core update functionality. An authenticated administrator can execute arbitrary OS commands on the server due to improper handling of user-controlled input that is directly passed to exec() without sufficient validation or escaping. This issue has been patched in version 5.2.3."
    },
    {
      "lang": "es",
      "value": "baserCMS es un framework de desarrollo de sitios web. Antes de la versi\u00f3n 5.2.3, baserCMS contiene una vulnerabilidad de inyecci\u00f3n de comandos del sistema operativo en la funcionalidad de actualizaci\u00f3n del n\u00facleo. Un administrador autenticado puede ejecutar comandos arbitrarios del sistema operativo en el servidor debido a un manejo inadecuado de la entrada controlada por el usuario que se pasa directamente a exec() sin suficiente validaci\u00f3n o escape. Este problema ha sido parcheado en la versi\u00f3n 5.2.3."
    }
  ],
  "id": "CVE-2026-21861",
  "lastModified": "2026-04-01T20:29:39.303",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
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          "confidentialityImpact": "HIGH",
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          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
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        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2026-03-31T01:16:35.540",
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      "tags": [
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      "url": "https://basercms.net/security/JVN_20837860"
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  "vulnStatus": "Analyzed",
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          "value": "CWE-78"
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      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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