CVE-2017-7759

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-06-11 · updated 2026-06-17
Weakness: CWE-200

Description

Android intent URLs given to Firefox for Android can be used to navigate from HTTP or HTTPS URLs to local "file:" URLs, allowing for the reading of local data through a violation of same-origin policy. Note: This attack only affects Firefox for Android. Other operating systems are not affected. This vulnerability affects Firefox < 54.

Affected products

Android: all versions
Mozilla Firefox: before 54.0 — fixed in 54.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 54.0. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/99052
http://www.securitytracker.com/id/1038689
https://bugzilla.mozilla.org/show_bug.cgi?id=1356893
https://www.mozilla.org/security/advisories/mfsa2017-15/
http://www.securityfocus.com/bid/99052
http://www.securitytracker.com/id/1038689
https://bugzilla.mozilla.org/show_bug.cgi?id=1356893
https://www.mozilla.org/security/advisories/mfsa2017-15/

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