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CVE-2025-11712 An OBJECT tag type attribute overrode browser behavior on web resources without a content-type

🗓️ 14 Oct 2025 12:27:35Reported by mozillaType 
cvelist
 cvelist
🔗 www.cve.org👁 11 Views

Malicious page overrides browser behavior with OBJECT type for resources without content-type; enables XSS.

Related
Affected
Refs
[
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "140.4",
        "lessThanOrEqual": "140.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "144",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  },
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "140.4",
        "lessThanOrEqual": "140.*",
        "versionType": "rpm"
      },
      {
        "status": "unaffected",
        "version": "144",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  }
]

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13 Apr 2026 14:29Current
EPSS0.00256
11