CVE-2017-7834

Severity: medium (CVSS 6.1 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-06-11 · updated 2026-06-17
Weakness: CWE-79

Description

A "data:" URL loaded in a new tab did not inherit the Content Security Policy (CSP) of the original page, allowing for bypasses of the policy including the execution of JavaScript. In prior versions when "data:" documents also inherited the context of the original page this would allow for potential cross-site scripting (XSS) attacks. This vulnerability affects Firefox < 57.

Affected products

Mozilla Firefox: through 56.0.2

References

http://www.securityfocus.com/bid/101832
http://www.securitytracker.com/id/1039803
https://bugzilla.mozilla.org/show_bug.cgi?id=1358009
https://www.mozilla.org/security/advisories/mfsa2017-24/
http://www.securityfocus.com/bid/101832
http://www.securitytracker.com/id/1039803
https://bugzilla.mozilla.org/show_bug.cgi?id=1358009
https://www.mozilla.org/security/advisories/mfsa2017-24/

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