What is the CVSS score of CVE-2025-3839?

CVE-2025-3839 has a contested CVSS base score of 8.0 from a third party (e.g. CISA-ADP), while the vendor rates it High. vuln.today uses the vendor rating as authoritative.

Which versions of Suse are affected by CVE-2025-3839?

CVE-2025-3839 affects Epiphany's URL handler mechanism, which could allow attackers to remotely exploit vulnerabilities in third-party applications through malicious web content.. A patch is available.

How to fix or mitigate CVE-2025-3839?

Within 24 hours: Inventory all systems running Epiphany and assess exposure in your environment; disable Epiphany's external URL handler functionality if operationally feasible. Within 7 days: Implement network-level restrictions on URL handler protocols and conduct user awareness training on suspicious link interactions. Within 30 days: Monitor vendor communications for patch availability; evaluate alternative browsers or endpoint isolation strategies; conduct security assessments of connected third-party applications that may be exploited via this vector.

Suse CVE-2025-3839

HIGH

Product UI does not Warn User of Unsafe Actions (CWE-356)

2026-01-23 patrick@puiterwijk.org

RCE Suse

High

Disputed · 8.0 NVD

Severity by source

Sources disagree (Low–High)

NVD PRIMARY

8.0 HIGH

AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

SUSE

3.1 LOW

AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

Patch released

Apr 06, 2026 - 02:30 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Jan 23, 2026 - 05:16 nvd

HIGH 8.0

DescriptionCVE.org

A flaw was found in Epiphany, a tool that allows websites to open external URL handler applications with minimal user interaction. This design can be misused to exploit vulnerabilities within those handlers, making them appear remotely exploitable. The browser fails to properly warn or gate this action, resulting in potential code execution on the client device via trusted UI behavior.