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CVE-2021-23135

Status: ModifiedMedium (5.5)—

Exposure of System Data to an Unauthorized Control Sphere vulnerability in web UI of Argo CD allows attacker to cause leaked secret data into web UI error messages and logs. This issue affects Argo CD 1.8 versions prior to 1.8.7; 1.7 versions prior to 1.7.14.

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)

Argoproj — Argo CD

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-23135",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 2.1,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "psirt@paloaltonetworks.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5.9,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 4,
        "exploitabilityScore": 1.5
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@paloaltonetworks.com",
      "affectedData": [
        {
          "vendor": "Argo CD",
          "product": "Argo CD",
          "versions": [
            {
              "status": "affected",
              "version": "1.8",
              "lessThan": "1.8.7",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "1.7",
              "lessThan": "1.7.14",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-05-12T23:15:07.757",
  "references": [
    {
      "url": "https://github.com/argoproj/argo-cd/security/advisories/GHSA-fp89-h8pj-8894",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "psirt@paloaltonetworks.com"
    },
    {
      "url": "https://github.com/argoproj/argo-cd/security/advisories/GHSA-fp89-h8pj-8894",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "psirt@paloaltonetworks.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-497"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-209"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Exposure of System Data to an Unauthorized Control Sphere vulnerability in web UI of Argo CD allows attacker to cause leaked secret data into web UI error messages and logs. This issue affects Argo CD 1.8 versions prior to 1.8.7; 1.7 versions prior to 1.7.14."
    },
    {
      "lang": "es",
      "value": "Una exposición de los Datos del Sistema en una vulnerabilidad de Esfera de Control No Autorizada en la Interfaz de Usuario web de Argo CD permite a un atacante causar una filtración de datos secretos en unos registros y mensajes de error de la Interfaz de Usuario web. Este problema afecta a Argo CD versiones 1.8 anteriores a 1.8.7; versiones 1.7 anteriores a 1.7.14"
    }
  ],
  "lastModified": "2026-06-17T03:38:19.790",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "40A5750C-C912-4356-8D48-ADD9C86F2DB0",
              "versionEndExcluding": "1.7.14",
              "versionStartIncluding": "1.7.0"
            },
            {
              "criteria": "cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3E438055-0F76-49F1-84CF-D33F82E45724",
              "versionEndExcluding": "1.8.7",
              "versionStartIncluding": "1.8.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "psirt@paloaltonetworks.com"
}