CVE-2017-7823

Name: CVE-2017-7823
Creator: NVD / NIST
Published: 2018-06-11T21:29:11+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.47%

Last modified Jun 17, 2026

CVE-2017-7823 is a vulnerability of currently unknown severity. 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. EPSS estimates a 1.47% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

1.47%

70.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Redhat	Enterprise Linux Desktop	6.0
Redhat	Enterprise Linux Desktop	7.0
Redhat	Enterprise Linux Server	6.0
Redhat	Enterprise Linux Server	7.0
Redhat	Enterprise Linux Server Aus	7.4
Redhat	Enterprise Linux Server Eus	7.4
Redhat	Enterprise Linux Server Eus	7.5
Redhat	Enterprise Linux Workstation	6.0
Redhat	Enterprise Linux Workstation	7.0
Debian	Debian Linux	7.0
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Mozilla	Firefox	< 52.4.0
Mozilla	Firefox	< 56.0
Mozilla	Thunderbird	< 52.4.0

References

http://www.securityfocus.com/bid/101059Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039465Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2017:2831Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2885Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1396320Exploit, Issue Tracking, Patch
https://lists.debian.org/debian-lts-announce/2017/11/msg00000.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201803-14Third Party Advisory
https://www.debian.org/security/2017/dsa-3987Third Party Advisory
https://www.debian.org/security/2017/dsa-4014Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2017-21/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-22/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-23/Vendor Advisory
http://www.securityfocus.com/bid/101059Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039465Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2017:2831Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2885Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1396320Exploit, Issue Tracking, Patch
https://lists.debian.org/debian-lts-announce/2017/11/msg00000.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201803-14Third Party Advisory
https://www.debian.org/security/2017/dsa-3987Third Party Advisory
https://www.debian.org/security/2017/dsa-4014Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2017-21/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-22/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-23/Vendor Advisory

Timeline

Published: Jun 11, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-7823?

How severe is CVE-2017-7823?

Severity scoring for CVE-2017-7823 is pending analysis. The EPSS model estimates a 1.47% probability of exploitation in the next 30 days.

How do I fix CVE-2017-7823?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-7823?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST