CVE-2015-7211

Status: ModifiedMedium (5)—
Mozilla Firefox before 43.0 mishandles the # (number sign) character in a data: URI, which allows remote attackers to spoof web sites via unspecified vectors.
CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N
Base score: 5
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 2.54%
Percentile among all scored CVEs: 85
Score date: 10/11/2026
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 (4)

Fedoraproject — Fedora Mozilla — Firefox Opensuse — Leap Opensuse — Opensuse
CWEs

CWE-20
References

Raw JSON (NVD)

Show
{
  "id": "CVE-2015-7211",
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          "authentication": "NONE",
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          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
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        "impactScore": 2.9,
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  "published": "2015-12-16T11:59:09.053",
  "references": [
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      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174083.html",
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      "value": "Mozilla Firefox before 43.0 mishandles the # (number sign) character in a data: URI, which allows remote attackers to spoof web sites via unspecified vectors."
    },
    {
      "lang": "es",
      "value": "Mozilla Firefox en versiones anteriores a 43.0 no maneja correctamente el carácter # (signo numérico) en un data: URI, lo que permite a atacantes remotos suplantar sitios web a través de vectores no especificados."
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  "lastModified": "2026-06-17T00:32:02.970",
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