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CVE-2018-5118

Status: ModifiedMedium (5.3)—

The screenshot images displayed in the Activity Stream page displayed when a new tab is opened is created from the meta tags of websites. An issue was discovered where the page could attempt to create these images through "file:" URLs from the local file system. This loading is blocked by the sandbox but could expose local data if combined with another attack that escapes sandbox protections. This vulnerability affects Firefox < 58.

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 (2)

Canonical — Ubuntu LinuxMozilla — Firefox

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2018-5118",
  "cveTags": [],
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          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
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  "published": "2018-06-11T21:29:13.623",
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      "value": "The screenshot images displayed in the Activity Stream page displayed when a new tab is opened is created from the meta tags of websites. An issue was discovered where the page could attempt to create these images through \"file:\" URLs from the local file system. This loading is blocked by the sandbox but could expose local data if combined with another attack that escapes sandbox protections. This vulnerability affects Firefox < 58."
    },
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      "value": "Las imágenes de captura de pantalla que se muestran en la página Activity Stream que aparece cuando se abre una nueva pestaña se crean a partir de las etiquetas meta de los sitios web. Se descubrió un problema en el que la página podría intentar crear estas imágenes a través de URL \"file:\" desde el sistema de archivos local. Esta carga es bloqueada por el sandbox, pero podría exponer datos locales si se combina con otro ataque que se escapa de las protecciones del sandbox. Esta vulnerabilidad afecta a las versiones anteriores a la 58 de Firefox."
    }
  ],
  "lastModified": "2026-06-17T01:59:39.340",
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