VulnerabilityDeferred

CVE-2025-3839

A flaw was found in Epiphany, a tool that allows websites to open external URL handler applications with minimal user interaction.

HIGH 8.0EPSS 0.41%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.41%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 3.1: 8.0 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
EPSS: 0.41% probability · 35th percentile
CISA KEV: Not listed
Weakness: CWE-356
Source: patrick@puiterwijk.org

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.