Mozilla Firefox up to 138 Copy as cURL command injection

Summaryinfo

A vulnerability was found in Mozilla Firefox up to 138 and classified as problematic. Impacted is an unknown function of the component Copy as cURL Handler. Such manipulation leads to Remote Privilege Escalation. This vulnerability is referenced as CVE-2025-5264. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 138 and classified as problematic. Affected by this issue is an unknown code of the component Copy as cURL Handler. The manipulation with an unknown input leads to a remote privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability affects Firefox < 139, Firefox ESR < 115.24, and Firefox ESR < 128.11.

The advisory is available at bugzilla.mozilla.org. This vulnerability is handled as CVE-2025-5264 since 05/27/2025. The exploitation is known to be difficult. The attack may be launched remotely. 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 $5k-$25k at the moment (estimation calculated on 08/16/2025). This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 237301 (Mozilla Firefox ESR < 115.24), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 139 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (237301) and CERT Bund (WID-SEC-2025-1850). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• Xerox FreeFlow Print Server

Productinfo

Type

• Web Browser

Vendor

• Mozilla

Name

• Firefox

Version

• 138

License

• open-source

Website

• Vendor: https://www.mozilla.org/
• Product: https://www.mozilla.org/en-US/firefox/

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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Entryinfo

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

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