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CVE-2016-5284

Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird < 45.4 rely on unintended expiration dates for Preloaded Public…

High7.4EPSS 2.4%
Published
Updated
Reserved
Assigned by
mozilla

Description

Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird < 45.4 rely on unintended expiration dates for Preloaded Public Key Pinning, which allows man-in-the-middle attackers to spoof add-on updates by leveraging possession of an X.509 server certificate for addons.mozilla.org signed by an arbitrary built-in Certification Authority.

Scores

CVSS scores of CVE-2016-5284, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.0High7.4CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
EPSS (exploitation in 30 days)
2.4% · top 16% 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 7.4.

Weakness

Affected products

  • n/a

    • affected n/a

References (13)

Sources

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

Record last updated .