4.3
MEDIUM
CVE-2025-1935
Firefox Custom URL Protocol Handler Vulnerability
Description

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

INFO

Published Date :

March 4, 2025, 2:15 p.m.

Last Modified :

March 25, 2025, 2:15 p.m.

Remotely Exploitable :

Yes !

Impact Score :

1.4

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2025-1935 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Mozilla firefox
2 Mozilla firefox_esr
3 Mozilla thunderbird
References to Advisories, Solutions, and Tools

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-1935 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2025-1935 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Mar. 25, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
    Added CWE CWE-79
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Mar. 12, 2025

    Action Type Old Value New Value
    Removed CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
    Removed CWE CWE-451
  • CVE Modified by [email protected]

    Mar. 05, 2025

    Action Type Old Value New Value
    Changed Description A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability affects Firefox < 136 and Firefox ESR < 128.8. A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability affects Firefox < 136, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8.
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-17/
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-18/
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Mar. 04, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
    Added CWE CWE-451
  • New CVE Received by [email protected]

    Mar. 04, 2025

    Action Type Old Value New Value
    Added Description A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability affects Firefox < 136 and Firefox ESR < 128.8.
    Added Reference https://bugzilla.mozilla.org/show_bug.cgi?id=1866661
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-14/
    Added Reference https://www.mozilla.org/security/advisories/mfsa2025-16/
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-1935 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-1935 weaknesses.

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability