High 7.5Published Jun 11, 2018

CVE-2017-5425The Gecko Media Plugin sandbox allows access to local files that match specific regular expressions.

Updated under an hour ago (Nov 2, 2026, 1:40 AM ET)

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It affects mozilla firefox and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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The Gecko Media Plugin sandbox allows access to local files that match specific regular expressions. On OS OX, this matching allows access to some data in subdirectories of "/private/var" that could expose personal or temporary data. This has been updated to not allow access to "/private/var" and its subdirectories. Note: this issue only affects OS X. Other operating systems are not affected. This vulnerability affects Firefox < 52 and Thunderbird < 52.

CVSS: 7.5 HIGH (v3.0, NVD)CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-200
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

mozilla firefox mozilla:firefox	before 52.0	NVD
mozilla thunderbird mozilla:thunderbird	before 52.0	NVD

References

References

http://www.securityfocus.com/bid/96692	third-party-advisory, vdb-entry
http://www.securitytracker.com/id/1037966	third-party-advisory, vdb-entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1322716	issue-tracking, vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2017-05/	vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2017-09/	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.