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CVE-2021-39910

Estado: ModificadaMedia (4.3)—

Se ha detectado un problema en GitLab CE/EE afectando a todas las versiones a partir de 12.6 anteriores a 14.3.6, todas las versiones a partir de 14.4 anteriores a 14.4.4, todas las versiones a partir de 14.5 anteriores a 14.5.2. GitLab era vulnerable a una inyección de HTML mediante la función Swagger UI

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Gitlab — Gitlab

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-39910",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
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    "cvssMetricV31": [
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          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 2.6,
          "attackVector": "NETWORK",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
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          "baseSeverity": "MEDIUM",
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          "confidentialityImpact": "NONE"
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        "impactScore": 1.4,
        "exploitabilityScore": 2.8
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  "affected": [
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      "source": "cve@gitlab.com",
      "affectedData": [
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          "vendor": "GitLab",
          "product": "GitLab",
          "versions": [
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              "status": "affected",
              "version": ">=12.6, <14.3.6"
            },
            {
              "status": "affected",
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  "published": "2021-12-13T16:15:08.740",
  "references": [
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      "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39910.json",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@gitlab.com"
    },
    {
      "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/325901",
      "tags": [
        "Broken Link"
      ],
      "source": "cve@gitlab.com"
    },
    {
      "url": "https://hackerone.com/reports/1133656",
      "tags": [
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      "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39910.json",
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    {
      "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/325901",
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      "url": "https://hackerone.com/reports/1133656",
      "tags": [
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        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.6 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. GitLab was vulnerable to HTML Injection through the Swagger UI feature."
    },
    {
      "lang": "es",
      "value": "Se ha detectado un problema en GitLab CE/EE afectando a todas las versiones a partir de 12.6 anteriores a 14.3.6, todas las versiones a partir de 14.4 anteriores a 14.4.4, todas las versiones a partir de 14.5 anteriores a 14.5.2. GitLab era vulnerable a una inyección de HTML mediante la función Swagger UI"
    }
  ],
  "lastModified": "2026-06-17T04:04:24.557",
  "configurations": [
    {
      "nodes": [
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          "negate": false,
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  "sourceIdentifier": "cve@gitlab.com"
}