CVE-2023-5730
Mozilla Firefox vulnerability
- Published25 Oct 2023
Description
Memory safety bugs present in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
Remediation
Frequently asked
Is CVE-2023-5730 being actively exploited?
CVE-2023-5730 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.46%.
How severe is CVE-2023-5730?
CVE-2023-5730 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.46% probability of exploitation.
Which products are affected by CVE-2023-5730?
Affected products include Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird, Debian Linux.
How do I fix CVE-2023-5730?
Upgrade affected software to a fixed version, for example Mozilla Firefox 119.0, Mozilla Firefox Esr 115.4, Mozilla Thunderbird 115.4.1 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2023-5730 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.