CVE-2025-1935CWE-79cross-site-scripting

CVE-2025-1935

Medium · published March 4, 2025

CVSS v3.1

4.3

EPSS

Percentile

26.5

In the wild

Unconfirmed

What it is

A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

The record

Technical detail

CVSS v3.1: 4.3 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CVSS v4.0: Not supplied
EPSS: 0.00343 · 26.5th percentile
Weakness: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published: 2025-03-04T19:15Z

Affected products (4)

Product	Versions	Fixed in
mozilla/firefox	< 128.8.0	128.8.0
mozilla/firefox	< 136.0	136.0
mozilla/thunderbird	< 128.8.0	128.8.0
mozilla/thunderbird	≥ 129.0, < 136.0	136.0

References (6)

https://bugzilla.mozilla.org/show_bug.cgi?id=1866661 · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-14/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-16/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-17/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-18/ · [email protected]https://lists.debian.org/debian-lts-announce/2025/03/msg00006.html · af854a3a-2127-422b-91ae-364da2661108

EPSS history

Timeline

04 MAR 13:31Z
Clickjacking the registerProtocolHandler info-bar
cvelistv5