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CVE-2020-12259

Status: ModifiedMedium (5.4)—Exploit
Severity5.4Medium · CVSS 3.1
Exploitation probability96 %higher than 100% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitAvailableNuclei template (automated mass detection)

rConfig 3.9.4 is vulnerable to reflected XSS. The configDevice.php file improperly validates user input. An attacker can exploit this vulnerability by crafting arbitrary JavaScript in the rid GET parameter of devicemgmnt.php.

CVSS

Base score
5.4
Version
3.1
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
96 %
Percentile among all scored CVEs
100
Score date
10/27/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Affected technologies (1)

Rconfig — Rconfig

CWEs

References

Show 2 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2020-12259",
  "cveTags": [],
  "metrics": {
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        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 3.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
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        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
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    "cvssMetricV31": [
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        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.3
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2020-05-18T13:15:10.893",
  "references": [
    {
      "url": "https://gist.github.com/farid007/8855031bad0e497264e4879efb5bc9f8",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
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      "url": "https://gist.github.com/farid007/8855031bad0e497264e4879efb5bc9f8",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "rConfig 3.9.4 is vulnerable to reflected XSS. The configDevice.php file improperly validates user input. An attacker can exploit this vulnerability by crafting arbitrary JavaScript in the rid GET parameter of devicemgmnt.php."
    },
    {
      "lang": "es",
      "value": "rConfig versión 3.9.4 es vulnerable a un ataque de tipo XSS reflejado. El archivo configDevice.php comprueba inapropiadamente las entradas de usuario. Un atacante puede explotar esta vulnerabilidad creando un JavaScript arbitrario en el parámetro GET rid del archivo devicemgmnt.php."
    }
  ],
  "lastModified": "2026-06-17T02:51:31.597",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:rconfig:rconfig:3.9.4:*:*:*:*:*:*:*",
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            }
          ],
          "operator": "OR"
        }
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    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}