{
  "id": "CVE-2021-39935",
  "url": "https://spydr.io/cve/CVE-2021-39935",
  "published": "2021-12-13T16:15:09.367Z",
  "modified": "2026-06-17T04:04:27.387Z",
  "score": 7.5,
  "severity": "high",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
  "score_source": "NVD",
  "epss": 0.35649,
  "epss_percentile": 0.98421,
  "exploited": true,
  "kev": {
    "added": "2026-02-03",
    "due": "2026-02-24",
    "action": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
    "ransomware": "Unknown",
    "name": "GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF) Vulnerability",
    "notes": "https://about.gitlab.com/releases/2021/12/06/security-release-gitlab-14-5-2-released/ ; https://nvd.nist.gov/vuln/detail/CVE-2021-39935"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "GitLab"
  ],
  "products": [
    "GitLab"
  ],
  "cwes": [
    "CWE-918"
  ],
  "description": "An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.5 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. Unauthorized external users could perform Server Side Requests via the CI Lint API",
  "status": "Analyzed",
  "score_type": "Primary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 7.5,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39935.json",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/346187",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://hackerone.com/reports/1236965",
      "tags": [
        "Permissions Required",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39935",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-39935",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}