CVE-2017-5389

Name: CVE-2017-5389
Creator: NVD / NIST
Published: 2018-06-11T21:29:03.453+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.93%

Last modified Jun 17, 2026

CVE-2017-5389 is a vulnerability of currently unknown severity. WebExtensions could use the "mozAddonManager" API by modifying the CSP headers on sites with the appropriate permissions and then using host requests to redirect script loads to a malicious site. This allows a malicious extension to then install additional extensions without explicit user permission. EPSS estimates a 0.93% chance of exploitation in the next 30 days.

Description

WebExtensions could use the "mozAddonManager" API by modifying the CSP headers on sites with the appropriate permissions and then using host requests to redirect script loads to a malicious site. This allows a malicious extension to then install additional extensions without explicit user permission. This vulnerability affects Firefox < 51.

Metrics

EPSS Probability

0.93%

56.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 51.0

References

http://www.securityfocus.com/bid/95763Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037693Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1308688Exploit, Issue Tracking, Patch, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-01/Vendor Advisory
http://www.securityfocus.com/bid/95763Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037693Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1308688Exploit, Issue Tracking, Patch, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-01/Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2017-5389?

How severe is CVE-2017-5389?

Severity scoring for CVE-2017-5389 is pending analysis. The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.

How do I fix CVE-2017-5389?

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-2017-5389?

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

Scan your code now

Source: NVD / NIST