GNOME Epiphany up to 47.4/48.0 External Protocol unsafe action warning

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in GNOME Epiphany up to 47.4/48.0. Affected by this issue is some unknown functionality of the component External Protocol Handler. Such manipulation leads to an unknown weakness. This vulnerability is listed as CVE-2025-3839. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in GNOME Epiphany up to 47.4/48.0. Affected by this issue is an unknown functionality of the component External Protocol Handler. Using CWE to declare the problem leads to CWE-356. The product's user interface does not warn the user before undertaking an unsafe action on behalf of that user. This makes it easier for attackers to trick users into inflicting damage to their system. Impacted is integrity. CVE summarizes:

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.

The advisory is shared for download at bugzilla.redhat.com. This vulnerability is handled as CVE-2025-3839 since 04/21/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 235676 (Fedora 41 : epiphany (2025-164c668d6a)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 47.5 or 48.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (235676). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 8.0
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Unsafe action warning
CWE: CWE-356
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 235676
Nessus Name: Fedora 41 : epiphany (2025-164c668d6a)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Epiphany 47.5/48.1

Timelineinfo

04/21/2025 🔍
04/21/2025 +0 days 🔍
04/21/2025 +0 days 🔍
01/25/2026 +279 days 🔍

Sourcesinfo

Vendor: gnome.org

Advisory: bugzilla.redhat.com
Status: Confirmed

CVE: CVE-2025-3839 (🔍)
GCVE (CVE): GCVE-0-2025-3839
GCVE (VulDB): GCVE-100-305768

Entryinfo

Created: 04/21/2025 14:00
Updated: 01/25/2026 06:02
Changes: 04/21/2025 14:00 (51), 05/12/2025 00:12 (2), 01/25/2026 06:02 (13)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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