CVE-2018-5124

Name: CVE-2018-5124
Creator: NVD / NIST
Published: 2019-04-26T17:29:00.743+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.01%

Last modified Jun 17, 2026

CVE-2018-5124 is a vulnerability of currently unknown severity. Unsanitized output in the browser UI leaves HTML tags in place and can result in arbitrary code execution in Firefox before version 58.0.1.. EPSS estimates a 1.01% chance of exploitation in the next 30 days.

Description

Unsanitized output in the browser UI leaves HTML tags in place and can result in arbitrary code execution in Firefox before version 58.0.1.

Metrics

EPSS Probability

1.01%

58.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 58.0.1

References

https://www.mozilla.org/en-US/security/advisories/mfsa2018-05/Vendor Advisory
https://www.mozilla.org/en-US/security/advisories/mfsa2018-05/Vendor Advisory

Timeline

Published: Apr 26, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-5124?

Unsanitized output in the browser UI leaves HTML tags in place and can result in arbitrary code execution in Firefox before version 58.0.1.

How severe is CVE-2018-5124?

Severity scoring for CVE-2018-5124 is pending analysis. The EPSS model estimates a 1.01% probability of exploitation in the next 30 days.

How do I fix CVE-2018-5124?

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-2018-5124?

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

Scan your code now

Source: NVD / NIST