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CVE-2021-39946

Estado: ModificadaMedia (5.4)—

Una neutralización inapropiada de la entrada del usuario en GitLab CE/EE versiones 14.3 a 14.3.6, 14.4 a 14.4.4 y 14.5 a 14.5.2, permitía a un atacante explotar una vulnerabilidad de tipo XSS al abusar de la generación del código HTML relacionado con los emojis

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-2021-39946",
  "cveTags": [],
  "metrics": {
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        "source": "nvd@nist.gov",
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          "baseScore": 3.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
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    ],
    "cvssMetricV31": [
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        "type": "Secondary",
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        "cvssData": {
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          "version": "3.1",
          "baseScore": 8.7,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
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  "affected": [
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      "affectedData": [
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          "product": "GitLab",
          "versions": [
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  "published": "2022-01-18T17:15:08.777",
  "references": [
    {
      "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39946.json",
      "tags": [
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      ],
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    {
      "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/345657",
      "tags": [
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      "source": "cve@gitlab.com"
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    {
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/345657",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "tags": [
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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": "Improper neutralization of user input in GitLab CE/EE versions 14.3 to 14.3.6, 14.4 to 14.4.4, and 14.5 to 14.5.2 allowed an attacker to exploit XSS by abusing the generation of the HTML code related to emojis"
    },
    {
      "lang": "es",
      "value": "Una neutralización inapropiada de la entrada del usuario en GitLab CE/EE versiones 14.3 a 14.3.6, 14.4 a 14.4.4 y 14.5 a 14.5.2, permitía a un atacante explotar una vulnerabilidad de tipo XSS al abusar de la generación del código HTML relacionado con los emojis"
    }
  ],
  "lastModified": "2026-06-17T04:04:28.640",
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