CVE-2025-0246Public exploitNetwork attack vector

Address bar spoofing via unhandled protocol navigation

Published Jan 7, 2025 · Updated Apr 13, 2026

Address bar spoofing in Mozilla Firefox for Android before 134 allows remote attackers to display a false URL via an invalid scheme. The toolbar replaces the address-bar text with an unhandled scheme even though navigation fails and the previously loaded HTTPS page remains visible. Exploitation requires navigation to an invalid or unhandled scheme; the result is a misleading origin display rather than page-content modification.

CVSS severity6.5
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Address bar spoofing in Mozilla Firefox for Android before 134 allows remote attackers to display a false URL via an invalid scheme. The toolbar replaces the address-bar text with an unhandled scheme even though navigation fails and the previously loaded HTTPS page remains visible. Exploitation requires navigation to an invalid or unhandled scheme; the result is a misleading origin display rather than page-content modification.

The record

CVE
CVE-2025-0246
Published
Jan 7, 2025
Updated
Apr 13, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1036
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1036Masquerading

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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