Is CVE-2024-8383 in the CISA KEV catalog?

No. CVE-2024-8383 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-8383?

CVE-2024-8383 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2024-8383?

CVE-2024-8383 has an EPSS score of 0.64% (46th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-8383?

Upgrade firefox on debian unstable to 130.0-1 or later. Fixes are available for 13 affected products.

CVE & CISA-KEV Catalog

CVE-2024-8383

HIGH

7.5

CVSS v3

NVD

Description

Firefox normally asks for confirmation before asking the operating system to find an application to handle a scheme that the browser does not support. It did not ask before doing so for the Usenet-related schemes news: and snews:. Since most operating systems don't have a trusted newsreader installed by default, an unscrupulous program that the user downloaded could register itself as a handler. The website that served the application download could then launch that application at will. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, and Firefox ESR < 115.15.

CWE-1188

How to fix

Remediation Available

firefoxDebian

Fixed in:130.0-1CVE-2024-8383

firefoxRed Hat / RHEL

Fixed in:0:128.2.0-1.el7_9RHSA-2024:6838

Fixed in:0:128.2.0-1.el8_4RHSA-2024:6891

Fixed in:0:128.2.0-1.el8_8RHSA-2024:6850

Fixed in:0:128.2.0-1.el8_2RHSA-2024:6839

Fixed in:0:128.2.0-1.el8_8RHSA-2024:6850

Fixed in:0:128.2.0-1.el8_2RHSA-2024:6839

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el8_4RHSA-2024:6891

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el8_4RHSA-2024:6891

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el8_6RHSA-2024:6892

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

Fixed in:0:128.2.0-1.el9_0RHSA-2024:6782

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

firefoxRocky

Fixed in:0:128.2.0-1.el7_9RHSA-2024:6838

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el8_4RHSA-2024:6891

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el8_2RHSA-2024:6839

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el8_2RHSA-2024:6839

Fixed in:0:128.2.0-1.el8_8RHSA-2024:6850

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el8_8RHSA-2024:6850

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el8_8RHSA-2024:6850

Fixed in:0:128.2.0-1.el8_4RHSA-2024:6891

Fixed in:0:128.2.0-1.el8_8RHSA-2024:6850

Fixed in:0:128.2.0-1.el8_6RHSA-2024:6892

Fixed in:0:128.2.0-1.el8_4RHSA-2024:6891

Fixed in:0:128.2.0-1.el8_6RHSA-2024:6892

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

Fixed in:0:128.2.0-1.el9_0RHSA-2024:6782

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

firefox-debuginfoRed Hat / RHEL

Fixed in:0:128.2.0-1.el7_9RHSA-2024:6838

Fixed in:0:128.2.0-1.el8_4RHSA-2024:6891

Fixed in:0:128.2.0-1.el8_2RHSA-2024:6839

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el8_4RHSA-2024:6891

Fixed in:0:128.2.0-1.el8_8RHSA-2024:6850

Fixed in:0:128.2.0-1.el8_6RHSA-2024:6892

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el8_8RHSA-2024:6850

Fixed in:0:128.2.0-1.el9_0RHSA-2024:6782

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

Fixed in:0:128.2.0-1.el9_0RHSA-2024:6782

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_0RHSA-2024:6782

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

firefox-debuginfoRocky

Fixed in:0:128.2.0-1.el7_9RHSA-2024:6838

Fixed in:0:128.2.0-1.el8_8RHSA-2024:6850

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el8_2RHSA-2024:6839

Fixed in:0:128.2.0-1.el8_8RHSA-2024:6850

Fixed in:0:128.2.0-1.el8_4RHSA-2024:6891

Fixed in:0:128.2.0-1.el8_8RHSA-2024:6850

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el8_4RHSA-2024:6891

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el8_6RHSA-2024:6892

Fixed in:0:128.2.0-1.el8_8RHSA-2024:6850

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

Fixed in:0:128.2.0-1.el9_0RHSA-2024:6782

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_0RHSA-2024:6782

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

firefox-debugsourceRed Hat / RHEL

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el8_6RHSA-2024:6892

Fixed in:0:128.2.0-1.el8_2RHSA-2024:6839

Fixed in:0:128.2.0-1.el8_4RHSA-2024:6891

Fixed in:0:128.2.0-1.el8_8RHSA-2024:6850

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

Fixed in:0:128.2.0-1.el9_0RHSA-2024:6782

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

Fixed in:0:128.2.0-1.el9_0RHSA-2024:6782

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_0RHSA-2024:6782

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

firefox-debugsourceRocky

Fixed in:0:128.2.0-1.el8_6RHSA-2024:6892

Fixed in:0:128.2.0-1.el8_2RHSA-2024:6839

Fixed in:0:128.2.0-1.el8_4RHSA-2024:6891

Fixed in:0:128.2.0-1.el8_8RHSA-2024:6850

Fixed in:0:128.2.0-1.el8_10RHSA-2024:6682

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

Fixed in:0:128.2.0-1.el9_0RHSA-2024:6782

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_0RHSA-2024:6782

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_0RHSA-2024:6782

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

Fixed in:0:128.2.0-1.el9_0RHSA-2024:6782

firefox-x11Red Hat / RHEL

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

firefox-x11Rocky

Fixed in:0:128.2.0-1.el9_2RHSA-2024:6786

Fixed in:0:128.2.0-1.el9_4RHSA-2024:6681

firefoxUbuntu

Fixed in:130.0+build2-0ubuntu0.20.04.1USN-6992-1

DeveloperEditionWindows application

Affected:130.0Fixed in:130.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:130.0Fixed in:130.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:128.0 128.2Fixed in:128.2Mozilla

Affected:115.15Fixed in:115.15Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploit Intelligence

0.64%probability of exploitation in 30 days

46thpercentile

Moderate risk: more likely to be exploited than 46% of all known CVEs.

References

Vendor Advisory3

Issue Tracking1

bugzilla.mozilla.org

Other references2

Related Vulnerabilities

Other CWE-1188 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13927	Critical	9.8	100%	KEV	Fix
CVE-2023-27524	High	8.9	97%	KEV	-
CVE-2022-24706	Critical	9.8	92%	KEV	Fix
CVE-2020-11532	Critical	9.8	77%	-	Fix
CVE-2018-16752	High	8.8	43%	-	-
CVE-2020-14011	Critical	9.8	29%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-04.