What is CVE-2025-55033?

CVE-2025-55033 is a medium-severity vulnerability in Mozilla Firefox_focus, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-08-19.

How severe is CVE-2025-55033?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Mozilla Firefox_focus

CVE-2025-55033

Dragging JavaScript links to the URL bar in Focus for iOS could be utilized to run malicious scripts, potentially resulting in XSS attacks. This vulnerability was fixed in Focus for iOS 142.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (6.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Mozilla Firefox_focus
Mozilla Focus For Ios — versions 142

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security@mozilla.org (Permissions Required, Issue Tracking)
security@mozilla.org (Vendor Advisory)

Frequently asked questions

What is CVE-2025-55033?: CVE-2025-55033 is a medium-severity vulnerability in Mozilla Firefox_focus, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-08-19.
How severe is CVE-2025-55033?: Medium severity. CVSS v3 base score is 6.1 out of 10.