CVE-2025-2256

{
  "id": "CVE-2025-2256",
  "sourceIdentifier": "[email protected]",
  "published": "2025-09-12T06:15:42.340",
  "lastModified": "2026-10-19T17:10:00.173",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue has been discovered in GitLab CE/EE affecting all versions from 7.12 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed unauthorized users to render the GitLab instance unresponsive to legitimate users by sending multiple concurrent large SAML responses."
    },
    {
      "lang": "es",
      "value": "Se ha descubierto un problema en GitLab CE/EE que afecta a todas las versiones desde la 7.12 anteriores a la 18.1.6, la 18.2 anteriores a la 18.2.6, y la 18.3 anteriores a la 18.3.2 que podría haber permitido a usuarios no autorizados dejar la instancia de GitLab sin respuesta para los usuarios legítimos al enviar múltiples respuestas SAML concurrentes de gran tamaño."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "GitLab",
          "product": "GitLab",
          "defaultStatus": "unaffected",
          "cpes": [
            "cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"
          ],
          "repo": "git://[email protected]:gitlab-org/gitlab.git",
          "versions": [
            {
              "version": "7.12",
              "lessThan": "18.1.6",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "18.2",
              "lessThan": "18.2.6",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "18.3",
              "lessThan": "18.3.2",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2025-09-12T17:19:23.671886Z",
          "id": "CVE-2025-2256",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1284"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
              "versionStartIncluding": "7.12.0",
              "versionEndExcluding": "18.1.6",
              "matchCriteriaId": "2DA1D9DE-488C-494C-9429-1782CFD0BC60"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
              "versionStartIncluding": "7.12.0",
              "versionEndExcluding": "18.1.6",
              "matchCriteriaId": "6EF9F050-955A-4E5A-9A27-3993063AD779"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
              "versionStartIncluding": "18.2.0",
              "versionEndExcluding": "18.2.6",
              "matchCriteriaId": "0AE72006-E61F-4311-85EC-6A66CEB965BF"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
              "versionStartIncluding": "18.2.0",
              "versionEndExcluding": "18.2.6",
              "matchCriteriaId": "08696B68-9433-4D5C-9B89-8C27B560EAAC"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
              "versionStartIncluding": "18.3.0",
              "versionEndExcluding": "18.3.2",
              "matchCriteriaId": "CBCE9083-14B2-4CB3-958F-A5A434802971"
            },
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              "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
              "versionStartIncluding": "18.3.0",
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              "matchCriteriaId": "D53E3D75-7E79-43CE-8A5B-91A8FA2B293E"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/",
      "source": "[email protected]",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/524633",
      "source": "[email protected]",
      "tags": [
        "Broken Link"
      ]
    },
    {
      "url": "https://hackerone.com/reports/3019485",
      "source": "[email protected]",
      "tags": [
        "Permissions Required"
      ]
    }
  ]
}