Remote code execution in GNOME Web (Epiphany)

1) Insufficient UI Warning of Dangerous Operations

EUVDB-ID: #VU107894

Risk: High

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2025-3839

CWE-ID: CWE-357 - Insufficient UI Warning of Dangerous Operations

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to incorrect handling of URLs that lead to external URI handlers. A remote attacker can trick the victim into clicking on a specially crafted URL and potentially execute arbitrary code on the system without any warnings to the user.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

GNOME Web (Epiphany): 47.0 - 48.0

CPE2.3

• cpe:2.3:a:gnome:epiphany:*:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:epiphany:47.2:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:epiphany:47.3:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:epiphany:47.3.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:epiphany:47.4:*:*:*:*:*:*:*
• cpe:2.3:a:gnome:epiphany:48.0:*:*:*:*:*:*:*

External links

https://bugzilla.redhat.com/show_bug.cgi?id=2361430

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.