FKIE_CVE-2020-25205

Vulnerability from fkie_nvd - Published: 2021-07-20 19:15 - Updated: 2026-06-17 03:06
Severity
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
The web console for Mimosa B5, B5c, and C5x firmware through 2.8.0.2 is vulnerable to stored XSS in the set_banner() function of /var/www/core/controller/index.php. An unauthenticated attacker may set the contents of the /mnt/jffs2/banner.txt file, stored on the device's filesystem, to contain arbitrary JavaScript. The file contents are then used as part of a welcome/banner message presented to unauthenticated users who visit the login page for the web console. This vulnerability does not occur in the older 1.5.x firmware versions.
References
cve@mitre.orghttps://labs.f-secure.com/advisories/Third Party Advisory
cve@mitre.orghttps://labs.f-secure.com/advisories/mimosa-ptp-devices-multiple-vulnerabilities/Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://labs.f-secure.com/advisories/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://labs.f-secure.com/advisories/mimosa-ptp-devices-multiple-vulnerabilities/Exploit, Third Party Advisory
Impacted products
Vendor Product Version
mimosa b5_firmware *
mimosa b5 -
mimosa b5c_firmware *
mimosa b5c -
mimosa c5c_firmware *
mimosa c5c -
To clipboard 

{
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    {
      "affectedData": [
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          "product": "n/a",
          "vendor": "n/a",
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              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The web console for Mimosa B5, B5c, and C5x firmware through 2.8.0.2 is vulnerable to stored XSS in the set_banner() function of /var/www/core/controller/index.php. An unauthenticated attacker may set the contents of the /mnt/jffs2/banner.txt file, stored on the device\u0027s filesystem, to contain arbitrary JavaScript. The file contents are then used as part of a welcome/banner message presented to unauthenticated users who visit the login page for the web console. This vulnerability does not occur in the older 1.5.x firmware versions."
    },
    {
      "lang": "es",
      "value": "La consola web para el firmware Mimosa B5, B5c y C5x versiones hasta 2.8.0.2, es vulnerable a un ataque de tipo XSS almacenado en la funci\u00f3n set_banner() del archivo /var/www/core/controller/index.php. Un atacante no autenticado puede ajustar el contenido del archivo /mnt/jffs2/banner.txt, almacenado en el sistema de archivos del dispositivo, para que contenga JavaScript arbitrario. El contenido del archivo es usado entonces como parte de un mensaje de welcome/banner presentado a usuarios no autenticados que visitan la p\u00e1gina de inicio de sesi\u00f3n de la consola web. Esta vulnerabilidad no ocurre en las versiones de firmware 1.5.x m\u00e1s antiguas"
    }
  ],
  "id": "CVE-2020-25205",
  "lastModified": "2026-06-17T03:06:34.763",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
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    "cvssMetricV31": [
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        "cvssData": {
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          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-07-20T19:15:09.563",
  "references": [
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      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
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      "url": "https://labs.f-secure.com/advisories/"
    },
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      "source": "cve@mitre.org",
      "tags": [
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.