What is CVE-2025-23108?

CVE-2025-23108 is a medium-severity vulnerability in Mozilla Firefox, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2025-01-11.

How severe is CVE-2025-23108?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Is CVE-2025-23108 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Mozilla Firefox

CVE-2025-23108

Opening Javascript links in a new tab via long-press in the Firefox iOS client could result in a malicious script spoofing the URL of the new tab. This vulnerability was fixed in Firefox for iOS 134.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (14.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

Affected products

Mozilla Firefox
Mozilla Firefox For Ios — versions 134

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

RenwaX23/Address_

References

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

Frequently asked questions

What is CVE-2025-23108?: CVE-2025-23108 is a medium-severity vulnerability in Mozilla Firefox, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2025-01-11.
How severe is CVE-2025-23108?: Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2025-23108 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.