Mozilla Firefox up to 109 URL File Remote Code Execution

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Mozilla Firefox up to 109. This affects an unknown part of the component URL File Handler. Executing a manipulation can lead to an unknown weakness. This vulnerability is tracked as CVE-2023-25734. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Mozilla Firefox up to 109 (Web Browser). This vulnerability affects an unknown functionality of the component URL File Handler. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

After downloading a Windows <code>.url</code> shortcut from the local filesystem, an attacker could supply a remote path that would lead to unexpected network requests from the operating system. This also had the potential to leak NTLM credentials to the resource.<br>*This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.

The weakness was disclosed 02/14/2023 by Ameen Basha M K and Shaheen Fazim as Bug 1809923 as confirmed advisory (Website). The advisory is available at bugzilla.mozilla.org. The advisory contains:

After downloading a Windows .url shortcut from the local filesystem, an attacker could supply a remote path that would lead to unexpected network requests from the operating system. This also had the potential to leak NTLM credentials to the resource.This bug only affects Firefox on Windows. Other operating systems are unaffected.
This vulnerability was named CVE-2023-25734. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/01/2025).

Upgrading to version 110 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-29641). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CNA Base Score: 8.1
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Remote Code Execution
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Firefox 110

Timelineinfo

02/13/2023 🔍
02/14/2023 +1 days 🔍
02/14/2023 +0 days 🔍
03/02/2023 +16 days 🔍
11/01/2025 +975 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: Bug 1809923
Researcher: Ameen Basha M K, Shaheen Fazim
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2023-25734 (🔍)
GCVE (CVE): GCVE-0-2023-25734
GCVE (VulDB): GCVE-100-222202
EUVD: 🔍

Entryinfo

Created: 03/02/2023 15:13
Updated: 11/01/2025 21:53
Changes: 03/02/2023 15:13 (17), 03/02/2023 15:16 (28), 03/30/2023 16:21 (1), 01/09/2025 22:44 (35), 04/27/2025 20:47 (3), 11/01/2025 21:53 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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