CVE-2025-0246 | Address bar spoofing using an invalid protocol scheme on Firefox for Android

When using an invalid protocol scheme, an attacker could spoof the address bar. *Note: This issue only affected Android operating systems. Other operating systems are unaffected.* *Note: This issue is a different issue from CVE-2025-0244. This vulnerability was fixed in Firefox 134.

Published: 2025-01-07 Last update: 2026-04-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-0246 is rated Moderate Risk (40.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.18%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-0246

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-29 0.14% 0.18% +0.05%
2 2026-03-22 0.18% 0.14% -0.04%
3 2026-02-15 — 0.18% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-0246

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 2.5 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-0246

OS Trackers for CVE-2025-0246

vendor priority summary link
alpine — CVE-2025-0246: 1 source package rows (firefox); 129 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 129. https://security.alpinelinux.org/vuln/CVE-2025-0246
debian unimportant CVE-2025-0246 unimportant priority: Debian including 1 source packages (firefox), 1 status rows across 1 suites (sid): resolved 1. https://security-tracker.debian.org/tracker/CVE-2025-0246
redhat medium — https://access.redhat.com/security/cve/CVE-2025-0246
suse high — https://www.suse.com/security/cve/CVE-2025-0246/
ubuntu negligible CVE-2025-0246 negligible priority: Ubuntu including 2 source packages (firefox, thunderbird), 10 status rows across 5 suites (focal, jammy, noble, oracular, upstream): not-affected 7, DNE 2, needs-triage 1. https://ubuntu.com/security/CVE-2025-0246

Affected software / configurations for CVE-2025-0246

Vendor Product Version Raw CPE
mozilla firefox < 134.0 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

References for CVE-2025-0246

cvelogic Threat Intelligence