CVE-2025-11720
Firefox Android Custom Tab Hostname Spoofing Vulnerability
Description
The Firefox and Firefox Focus UI for the Android custom tab feature only showed the "site" that was loaded, not the full hostname. User supplied content hosted on a subdomain of a site could have been used to fool a user into thinking it was content from a different subdomain of that site. This vulnerability affects Firefox < 144.
INFO
Published Date :
Oct. 14, 2025, 1:15 p.m.
Last Modified :
Oct. 15, 2025, 6:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Firefox to version 144 or later.
- Update Firefox Focus to version 144 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-11720.
| URL | Resource |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1979534 | Issue Tracking Permissions Required |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1984370 | Issue Tracking Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2025-81/ | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-11720 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-2025-11720
weaknesses.
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-2025-11720 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-11720 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.
-
Initial Analysis by [email protected]
Oct. 15, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Added CPE Configuration AND OR *cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* versions up to (excluding) 144.0 OR cpe:2.3:o:google:android:-:*:*:*:*:*:*:* Added Reference Type Mozilla Corporation: https://bugzilla.mozilla.org/show_bug.cgi?id=1979534 Types: Issue Tracking, Permissions Required Added Reference Type Mozilla Corporation: https://bugzilla.mozilla.org/show_bug.cgi?id=1984370 Types: Issue Tracking, Permissions Required Added Reference Type Mozilla Corporation: https://www.mozilla.org/security/advisories/mfsa2025-81/ Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 15, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Added CWE CWE-451 -
New CVE Received by [email protected]
Oct. 14, 2025
Action Type Old Value New Value Added Description The Firefox and Firefox Focus UI for the Android custom tab feature only showed the "site" that was loaded, not the full hostname. User supplied content hosted on a subdomain of a site could have been used to fool a user into thinking it was content from a different subdomain of that site. This vulnerability affects Firefox < 144. Added Reference https://bugzilla.mozilla.org/show_bug.cgi?id=1979534 Added Reference https://bugzilla.mozilla.org/show_bug.cgi?id=1984370 Added Reference https://www.mozilla.org/security/advisories/mfsa2025-81/