CVE-2024-1563

HIGH

8.1

CVSS Score

Published: February 22, 2024 at 02:56 PM UTC

Updated: June 17, 2026 at 07:04 AM UTC

2 products affected across 1 vendorFirefox FocusFocus

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Severity

HIGH8.1

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

Description

An attacker could have executed unauthorized scripts on top origin sites using a JavaScript URI when opening an external URL with a custom Firefox scheme and a timeout race condition. This vulnerability affects Focus for iOS < 122.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firefox Focus · Mozilla

95%

v < 122.0

Affected range stops below 122.0, so it looks safe — our inference, not a vendor statement

Focus · Mozilla

60%

v < 122

Affected range stops below 122, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://www.mozilla.org/security/advisories/mfsa2024-09/

References (2)

Issue Tracking

Source: [email protected]

https://bugzilla.mozilla.org/show_bug.cgi?id=1863831

Vendor Advisory

Source: [email protected]

https://www.mozilla.org/security/advisories/mfsa2024-09/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGHCISA-ADP

Attack Vector: NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-367

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