CVE-2023-25729

Mozilla: Extensions could have opened external schemes without user knowledge

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

NVD
RedHat

Permission prompts for opening external schemes were only shown for <code>ContentPrincipals</code> resulting in extensions being able to open them without user interaction via <code>ExpandedPrincipals</code>. This could lead to further malicious actions such as downloading files or interacting with software already installed on the system. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.

The Mozilla Foundation Security Advisory describes this flaw as:

Permission prompts for opening external schemes were only shown for `ContentPrincipals` resulting in extensions being able to open them without user interaction via `ExpandedPrincipals`. This could lead to further malicious actions such as downloading files or interacting with software already installed on the system.

*Credits: N/A

CVSS Scores

NISTv3.1 8.8

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-02-13 CVE Reserved
2023-02-16 CVE Published
2024-08-02 CVE Updated
2024-11-12 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-84: Improper Neutralization of Encoded URI Schemes in a Web Page

CAPEC

References (5)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.mozilla.org/security/advisories/mfsa2023-05	2023-06-08
https://www.mozilla.org/security/advisories/mfsa2023-06	2023-06-08
https://www.mozilla.org/security/advisories/mfsa2023-07	2023-06-08
https://access.redhat.com/security/cve/CVE-2023-25729	2023-02-20
https://bugzilla.redhat.com/show_bug.cgi?id=2170382	2023-02-20

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mozilla Search vendor "Mozilla"		Firefox Search vendor "Mozilla" for product "Firefox"				< 110.0 Search vendor "Mozilla" for product "Firefox" and version " < 110.0"		-		Affected
Mozilla Search vendor "Mozilla"		Firefox Esr Search vendor "Mozilla" for product "Firefox Esr"				< 102.8 Search vendor "Mozilla" for product "Firefox Esr" and version " < 102.8"		-		Affected
Mozilla Search vendor "Mozilla"		Thunderbird Search vendor "Mozilla" for product "Thunderbird"				< 102.8 Search vendor "Mozilla" for product "Thunderbird" and version " < 102.8"		-		Affected