CVE-2018-5175

Name: CVE-2018-5175
Creator: NVD / NIST
Published: 2018-06-11T21:29:16.03+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.45%

Last modified Jun 17, 2026

CVE-2018-5175 is a vulnerability of currently unknown severity. A mechanism to bypass Content Security Policy (CSP) protections on sites that have a "script-src" policy of "'strict-dynamic'". If a target website contains an HTML injection flaw an attacker could inject a reference to a copy of the "require.js" library that is part of Firefox's Developer Tools, and then use a known technique using that library to bypass the CSP restrictions on executing injected scripts. EPSS estimates a 1.45% chance of exploitation in the next 30 days.

Description

A mechanism to bypass Content Security Policy (CSP) protections on sites that have a "script-src" policy of "'strict-dynamic'". If a target website contains an HTML injection flaw an attacker could inject a reference to a copy of the "require.js" library that is part of Firefox's Developer Tools, and then use a known technique using that library to bypass the CSP restrictions on executing injected scripts. This vulnerability affects Firefox < 60.

Metrics

EPSS Probability

1.45%

70.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	17.10
Canonical	Ubuntu Linux	18.04
Mozilla	Firefox	< 60.0

References

http://www.securityfocus.com/bid/104139Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040896Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1432358Issue Tracking, Permissions Required, Vendor Advisory
https://usn.ubuntu.com/3645-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-11/Vendor Advisory
http://www.securityfocus.com/bid/104139Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040896Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1432358Issue Tracking, Permissions Required, Vendor Advisory
https://usn.ubuntu.com/3645-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-11/Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2018-5175?

How severe is CVE-2018-5175?

Severity scoring for CVE-2018-5175 is pending analysis. The EPSS model estimates a 1.45% probability of exploitation in the next 30 days.

How do I fix CVE-2018-5175?

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-2018-5175?

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

Scan your code now

Source: NVD / NIST