CVE-2018-5124
CVE-2018-5124 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.
Key facts
- Severity: Medium (CVSS 3.x base score 6.1)
- CVSS v2: 4.3
- EPSS exploit prediction: 1% (59th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Mozilla Firefox
- Published:
- Last modified:
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.
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?
- CVE-2018-5124 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2018-5124 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-5124?
- CVE-2018-5124 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-5124?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2018-5124 published?
- CVE-2018-5124 was published on 2019-04-26 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
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