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CVE-2017-6927

Status: ModifiedMedium (6.1)—
Severity6.1Medium · CVSS 3.0
Exploitation probability1.61 %higher than 76% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

Drupal 8.4.x versions before 8.4.5 and Drupal 7.x versions before 7.57 has a Drupal.checkPlain() JavaScript function which is used to escape potentially dangerous text before outputting it to HTML (as JavaScript output does not typically go through Twig autoescaping). This function does not correctly handle all methods of injecting malicious HTML, leading to a cross-site scripting vulnerability under certain circumstances. The PHP functions which Drupal provides for HTML escaping are not affected.

CVSS

Base score
6.1
Version
3.0
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
1.61 %
Percentile among all scored CVEs
76
Score date
10/20/2026

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 (2)

Debian — Debian LinuxDrupal — Drupal

CWEs

References

Show 8 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2017-6927",
  "cveTags": [],
  "metrics": {
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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"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
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    "cvssMetricV30": [
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        "cvssData": {
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          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "mlhess@drupal.org",
      "affectedData": [
        {
          "vendor": "Drupal.org",
          "product": "Drupal Core",
          "versions": [
            {
              "status": "affected",
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            }
          ]
        }
      ]
    }
  ],
  "published": "2018-03-01T23:29:00.297",
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    {
      "url": "http://www.securityfocus.com/bid/103138",
      "tags": [
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      "source": "mlhess@drupal.org"
    },
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      "tags": [
        "Mailing List",
        "Third Party Advisory"
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      "source": "mlhess@drupal.org"
    },
    {
      "url": "https://www.debian.org/security/2018/dsa-4123",
      "tags": [
        "Third Party Advisory"
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      "source": "mlhess@drupal.org"
    },
    {
      "url": "https://www.drupal.org/sa-core-2018-001",
      "tags": [
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    {
      "url": "http://www.securityfocus.com/bid/103138",
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        "VDB Entry"
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    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2018/02/msg00030.html",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://www.debian.org/security/2018/dsa-4123",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Drupal 8.4.x versions before 8.4.5 and Drupal 7.x versions before 7.57 has a Drupal.checkPlain() JavaScript function which is used to escape potentially dangerous text before outputting it to HTML (as JavaScript output does not typically go through Twig autoescaping). This function does not correctly handle all methods of injecting malicious HTML, leading to a cross-site scripting vulnerability under certain circumstances. The PHP functions which Drupal provides for HTML escaping are not affected."
    },
    {
      "lang": "es",
      "value": "Las versiones 8.4.x de Drupal anteriores a la 8.4.5 y las versiones 7.x anteriores a la 7.57 tienen una función de JavaScript Drupal.checkPlain() que se emplea para escapar texto potencialmente peligroso antes de extraerlo como HTML (ya que la exportación JavaScript no suele pasar un proceso de autoescape Twig). Esta función no gestiona adecuadamente todos los métodos de inyección de HTML malicioso, lo que conduce a una vulnerabilidad de Cross-Site Scripting (XSS) en ciertas circunstancias. Las funciones de PHP que Drupal proporciona para escapar HTML no se han visto afectadas."
    }
  ],
  "lastModified": "2026-06-17T01:23:21.000",
  "configurations": [
    {
      "nodes": [
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  "sourceIdentifier": "mlhess@drupal.org"
}