Dashboard / CVE-2025-6425

CVE-2025-6425

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 59/100
Published: 2025-06-24 Modified: 2026-10-23 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Required
S: Unchanged
C: Low
I: None
A: None

Description

An attacker who enumerated resources from the WebCompat extension could have obtained a persistent UUID that identified the browser, and persisted between containers and normal/private browsing mode, but not profiles. This vulnerability was fixed in Firefox 140, Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
mozilla firefox < 115.25.0
mozilla firefox < 140.0

References & Advisories (8)

Bug Bounty Relevance

59 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

4.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

EPSS — Exploitation Probability

0.31%
Raw Score 0.003100
Percentile 23.8%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00310
2026-10-28
0.00310

Intelligence Sources

nvd ref →

External Links