CVE-2025-14046 (GCVE-0-2025-14046)

Vulnerability from cvelistv5 – Published: 2025-12-11 17:52 – Updated: 2025-12-11 18:48
VLAI
Title
Insufficient HTML Sanitization Allows User-Controlled DOM Elements to Overwrite Server-Initialized Data Islands and Trigger Unintended Server-Side POST Requests
Summary
An improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allowed user-supplied HTML to inject DOM elements with IDs that collided with server-initialized data islands. These collisions could overwrite or shadow critical application state objects used by certain Project views, leading to unintended server-side POST requests or other unauthorized backend interactions. Successful exploitation requires an attacker to have access to the target GitHub Enterprise Server instance and to entice a privileged user to view crafted malicious content that includes conflicting HTML elements. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.18.3, 3.17.9, 3.16.12, 3.15.16, and 3.14.21.
Severity
8.6 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-11 18:46 UTC
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
GitHub_P CNA under the mitre root
CNA scorecard B 83/100 over 28 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
GitHub Enterprise Server Unaffected: 3.19.0 (semver)
Affected: 3.18.0 , ≤ 3.18.2 (semver)
Affected: 3.17.0 , ≤ 3.17.8 (semver)
Affected: 3.16.0 , ≤ 3.16.11 (semver)
Affected: 3.15.0 , ≤ 3.15.15 (semver)
Affected: 3.14.0 , ≤ 3.14.20 (semver)
guessed Create a notification for this product.
Credits
André Storfjord Kristiansen
Show details on NVD website
To clipboard 

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                  "value": "An improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allowed user-supplied HTML to inject DOM elements with IDs that collided with server-initialized data islands. These collisions could overwrite or shadow critical application state objects used by certain Project views, leading to unintended server-side POST requests or other unauthorized backend interactions. Successful exploitation requires an attacker to have access to the target GitHub Enterprise Server instance and to entice a privileged user to view crafted malicious content that includes conflicting HTML elements. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.18.3, 3.17.9, 3.16.12, 3.15.16, and 3.14.21."
                }
              ],
              "value": "An improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allowed user-supplied HTML to inject DOM elements with IDs that collided with server-initialized data islands. These collisions could overwrite or shadow critical application state objects used by certain Project views, leading to unintended server-side POST requests or other unauthorized backend interactions. Successful exploitation requires an attacker to have access to the target GitHub Enterprise Server instance and to entice a privileged user to view crafted malicious content that includes conflicting HTML elements. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.18.3, 3.17.9, 3.16.12, 3.15.16, and 3.14.21."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-588",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-588 DOM-Based XSS"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "baseScore": 8.6,
                "baseSeverity": "HIGH",
                "exploitMaturity": "NOT_DEFINED",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "PASSIVE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-79",
                  "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-12-11T17:52:05.353Z",
            "orgId": "82327ea3-741d-41e4-88f8-2cf9e791e760",
            "shortName": "GitHub_P"
          },
          "references": [
            {
              "url": "https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.3"
            },
            {
              "url": "https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.9"
            },
            {
              "url": "https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.12"
            },
            {
              "url": "https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.16"
            },
            {
              "url": "https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.21"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "Insufficient HTML Sanitization Allows User-Controlled DOM Elements to Overwrite Server-Initialized Data Islands and Trigger Unintended Server-Side POST Requests",
          "x_generator": {
            "engine": "Vulnogram 0.5.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "82327ea3-741d-41e4-88f8-2cf9e791e760",
        "assignerShortName": "GitHub_P",
        "cveId": "CVE-2025-14046",
        "datePublished": "2025-12-11T17:52:05.353Z",
        "dateReserved": "2025-12-04T16:22:53.626Z",
        "dateUpdated": "2025-12-11T18:48:17.846Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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