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CVE-2021-33178

Status: ModifiedMedium (6.5)—

The Manage Backgrounds functionality within NagVis versions prior to 1.9.29 is vulnerable to an authenticated path traversal vulnerability. Exploitation of this results in a malicious actor having the ability to arbitrarily delete files on the local system.

CVSS

Exploitation probability (EPSS)

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).

Affected technologies (1)

Nagvis — Nagvis

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-33178",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 8.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:C/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 9.2,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 1.2
      }
    ]
  },
  "affected": [
    {
      "source": "disclosure@synopsys.com",
      "affectedData": [
        {
          "vendor": "NagVis",
          "product": "NagVis",
          "versions": [
            {
              "status": "affected",
              "version": "<1.9.29"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-10-14T15:15:09.040",
  "references": [
    {
      "url": "https://nagvis.org/downloads/changelog/1.9.29",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "source": "disclosure@synopsys.com"
    },
    {
      "url": "https://www.synopsys.com/blogs/software-security/cyrc-advisory-nagios-xi",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "disclosure@synopsys.com"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00000.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://nagvis.org/downloads/changelog/1.9.29",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.synopsys.com/blogs/software-security/cyrc-advisory-nagios-xi",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "disclosure@synopsys.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Manage Backgrounds functionality within NagVis versions prior to 1.9.29 is vulnerable to an authenticated path traversal vulnerability. Exploitation of this results in a malicious actor having the ability to arbitrarily delete files on the local system."
    },
    {
      "lang": "es",
      "value": "La funcionalidad de gestión de fondos en las versiones de NagVis anteriores a la versiión 1.9.29 es vulnerable a una vulnerabilidad de cruce de ruta autenticada. La explotación de esta vulnerabilidad hace que un actor malintencionado tenga la capacidad de eliminar arbitrariamente archivos en el sistema local"
    }
  ],
  "lastModified": "2026-06-17T03:54:18.647",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:nagvis:nagvis:*:*:*:*:*:nagios_xi:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1A8270EC-0D33-455E-B365-0218C2958F90",
              "versionEndExcluding": "1.9.29"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "disclosure@synopsys.com"
}