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CVE-2016-9900

External resources that should be blocked when loaded by SVG images can bypass security restrictions through the use of "data:" URLs. This…

High7.5EPSS 9.6%
Published
Updated
Reserved
Assigned by
mozilla

Description

External resources that should be blocked when loaded by SVG images can bypass security restrictions through the use of "data:" URLs. This could allow for cross-domain data leakage. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.

Scores

CVSS scores of CVE-2016-9900, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.0High7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (exploitation in 30 days)
9.6% · top 4.5% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

Affected products

  • Mozilla · Firefox

    • affected unspecified – < 50.1

  • Mozilla · Firefox ESR

    • affected unspecified – < 45.6

  • Mozilla · Thunderbird

    • affected unspecified – < 45.6

References (10)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .