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CVE-2025-55038

Full vulnerability record from the local CVENow database.

Description

An authorization bypass vulnerability has been discovered in the Click Plus C2-03CPU2 device firmware version 3.60. Through the KOPR protocol utilized by the Remote PLC application, authenticated users with low-level access permissions can exploit this vulnerability to read and modify PLC variables beyond their intended authorization level.

Severity
HIGH
CVSS score
7.6 (v4.0)
Vulnerability status
Deferred
Source identifier
Published
2025-09-23 23:15:30.497000
Last modified
2026-10-18 21:10:00.120000
View original CVE JSON
{
  "id": "CVE-2025-55038",
  "sourceIdentifier": "[email protected]",
  "published": "2025-09-23T23:15:30.497",
  "lastModified": "2026-10-18T21:10:00.120",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An authorization bypass vulnerability has been discovered in the Click Plus C2-03CPU2 device firmware version 3.60. Through the KOPR protocol utilized by the Remote PLC application, authenticated users with low-level access permissions can exploit this vulnerability to read and modify PLC variables beyond their intended authorization level."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de omisión de autorización ha sido descubierta en el firmware versión 3.60 del dispositivo Click Plus C2-03CPU2. A través del protocolo KOPR utilizado por la aplicación Remote PLC, usuarios autenticados con permisos de acceso de bajo nivel pueden explotar esta vulnerabilidad para leer y modificar variables del PLC más allá de su nivel de autorización previsto."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "AutomationDirect",
          "product": "CLICK PLUS C0-0x CPU firmware",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "v3.71",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "AutomationDirect",
          "product": "CLICK PLUS C0-1x CPU firmware",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "v3.71",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "AutomationDirect",
          "product": "CLICK PLUS C2-x CPU firmware",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "v3.71",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "baseScore": 7.6,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2025-09-24T14:06:10.499891Z",
          "id": "CVE-2025-55038",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://www.automationdirect.com/support/software-downloads",
      "source": "[email protected]"
    },
    {
      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-25-266-01",
      "source": "[email protected]"
    }
  ]
}