What’s Vulnerable › Vulnerabilities

CVE-2015-7327

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2015-09-24 · updated 2026-06-17
• Weakness: CWE-200

Description

Mozilla Firefox before 41.0 does not properly restrict the availability of High Resolution Time API times, which allows remote attackers to track last-level cache access, and consequently obtain sensitive information, via crafted JavaScript code that makes performance.now calls.

Affected products

• Mozilla Firefox: through 40.0.3

References

• http://arxiv.org/abs/1502.07373
• http://www.mozilla.org/security/announce/2015/mfsa2015-114.html
• http://www.securitytracker.com/id/1033640
• https://bugzilla.mozilla.org/show_bug.cgi?id=1153672
• https://bugzilla.mozilla.org/show_bug.cgi?id=1167489
• http://arxiv.org/abs/1502.07373
• http://www.mozilla.org/security/announce/2015/mfsa2015-114.html
• http://www.securitytracker.com/id/1033640
• https://bugzilla.mozilla.org/show_bug.cgi?id=1153672
• https://bugzilla.mozilla.org/show_bug.cgi?id=1167489

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