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CVE-2019-3403

Status: ModifiedMedium (5.3)—💥 Exploit

The /rest/api/2/user/picker rest resource in Jira before version 7.13.3, from version 8.0.0 before version 8.0.4, and from version 8.1.0 before version 8.1.1 allows remote attackers to enumerate usernames via an incorrect authorisation check.

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).

💥 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.

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

Affected technologies (2)

Atlassian — JiraAtlassian — Jira Server

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2019-3403",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/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": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@atlassian.com",
      "affectedData": [
        {
          "vendor": "Atlassian",
          "product": "Jira",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "7.13.3",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "8.0.0",
              "lessThan": "unspecified",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "8.0.4",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "8.1.0",
              "lessThan": "unspecified",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "unspecified",
              "lessThan": "8.1.1",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2019-05-22T18:29:00.833",
  "references": [
    {
      "url": "https://jira.atlassian.com/browse/JRASERVER-69242",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "security@atlassian.com"
    },
    {
      "url": "https://jira.atlassian.com/browse/JRASERVER-69242",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@atlassian.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The /rest/api/2/user/picker rest resource in Jira before version 7.13.3, from version 8.0.0 before version 8.0.4, and from version 8.1.0 before version 8.1.1 allows remote attackers to enumerate usernames via an incorrect authorisation check."
    },
    {
      "lang": "es",
      "value": "The /rest/api/2/user/picker rest resource en Jira antes de la versión 7.13.3, desde la versión 8.0.0 antes versión 8.0.4, y desde versión 8.1.0 antes de la versión 8.1.1, permite a los atacantes remotos enumerar los nombres de usuario mediante una comprobación de autorización incorrecta."
    }
  ],
  "lastModified": "2026-06-17T02:35:06.473",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:atlassian:jira:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3AAAD6CB-BAF7-4FE4-BB84-F7614F28AEEB",
              "versionEndExcluding": "7.13.3"
            },
            {
              "criteria": "cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D2468233-97B0-4673-A2EA-5787CFD56097",
              "versionEndExcluding": "8.0.4",
              "versionStartIncluding": "8.0.0"
            },
            {
              "criteria": "cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2806E160-A601-4276-A3F2-8F73DA3AE3E0",
              "versionEndExcluding": "8.1.1",
              "versionStartIncluding": "8.1.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@atlassian.com"
}