CVE-2017-7823
CVSS v3
5.4
MEDIUM
EPSS Score
1.4 %
exploit probability, as of 2026-10-18
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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Affected and fixed versions
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Mozilla: CSP sandbox directive did not create a unique origin (MFSA 2017-22)
Red Hat Security Advisory: thunderbird security update
Red Hat Security Advisory: firefox security update
Description
The content security policy (CSP) "sandbox" directive did not create a unique origin for the document, causing it to behave as if the "allow-same-origin" keyword were always specified. This could allow a Cross-Site Scripting (XSS) attack to be launched from unsafe content. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
Technical details
- Published
- 2018-06-11
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