CVE-2024-11698: Mozilla Firefox vulnerability (CVSS 9.8)

Description

A flaw in handling fullscreen transitions may have inadvertently caused the application to become stuck in fullscreen mode when a modal dialog was opened during the transition. This issue left users unable to exit fullscreen mode using standard actions like pressing "Esc" or accessing right-click menus, resulting in a disrupted browsing experience until the browser is restarted. *This bug only affects the application when running on macOS. Other operating systems are unaffected.* This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Thunderbird < 133, and Thunderbird < 128.5.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Mozilla Firefox< 133.0 · < 128.5.0

Mozilla Thunderbird≥ 129.0 < 133.0 · < 128.5.0

Remediation

Fixed in

Mozilla Firefox≥ 133.0

Mozilla Thunderbird≥ 133.0

Patch & vendor advisories

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1916152Issue Tracking
https://www.mozilla.org/security/advisories/mfsa2024-63/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-64/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-67/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-68/Vendor Advisory

Frequently asked

Is CVE-2024-11698 being actively exploited?

CVE-2024-11698 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.69%.

How severe is CVE-2024-11698?

CVE-2024-11698 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.69% probability of exploitation.

Which products are affected by CVE-2024-11698?

Affected products include Mozilla Firefox, Mozilla Thunderbird.

How do I fix CVE-2024-11698?

Upgrade affected software to a fixed version, for example Mozilla Firefox 133.0, Mozilla Thunderbird 133.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-11698 against the real software inventory on every managed device, as each hourly inventory arrives. 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.

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