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CVE-2023-3906

Status: AnalyzedLow (3.5)—

An input validation issue in the asset proxy in GitLab EE, affecting all versions from 12.3 prior to 16.2.8, 16.3 prior to 16.3.5, and 16.4 prior to 16.4.1, allowed an authenticated attacker to craft image urls which bypass the asset proxy.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Gitlab — Gitlab

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2023-3906",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2023-3906",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-08-30T14:28:00.520335Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "cve@gitlab.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 3.5,
          "attackVector": "NETWORK",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.1
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
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          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
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          "confidentialityImpact": "LOW"
        },
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        "exploitabilityScore": 2.1
      }
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  },
  "affected": [
    {
      "source": "cve@gitlab.com",
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          ],
          "repo": "git://git@gitlab.com:gitlab-org/gitlab.git",
          "vendor": "GitLab",
          "product": "GitLab",
          "versions": [
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              "status": "affected",
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              "lessThan": "16.2.8",
              "versionType": "semver"
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              "version": "16.3",
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  "published": "2023-09-29T07:15:13.233",
  "references": [
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      "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/419213",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
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      "source": "cve@gitlab.com"
    },
    {
      "url": "https://hackerone.com/reports/2071411",
      "tags": [
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      "source": "cve@gitlab.com"
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    {
      "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/419213",
      "tags": [
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cve@gitlab.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1287"
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    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An input validation issue in the asset proxy in GitLab EE, affecting all versions from 12.3 prior to 16.2.8, 16.3 prior to 16.3.5, and 16.4 prior to 16.4.1, allowed an authenticated attacker to craft image urls which bypass the asset proxy."
    },
    {
      "lang": "es",
      "value": "Un problema de validación de entrada en el proxy de activos en GitLab EE, que afectó a todas las versiones desde 12.3 anterior a 16.2.8, 16.3 anterior a 16.3.5 y 16.4 anterior a 16.4.1, permitió a un atacante autenticado crear URL de imágenes que omitían el activo apoderado."
    }
  ],
  "lastModified": "2026-06-17T06:15:18.010",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "16.2.8",
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            },
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              "versionEndExcluding": "16.3.5",
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            },
            {
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              "versionEndExcluding": "16.3.5",
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            },
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  "sourceIdentifier": "cve@gitlab.com"
}