CVE-2025-8030 is a vulnerability identified in Mozilla Firefox and Thunderbird's “Copy as cURL” feature, which fails to properly escape input data. This flaw is categorized under CWE-94 (Improper Control of Generation of Code), indicating that malicious input can lead to code injection or execution. The vulnerability affects Firefox versions earlier than 141 and ESR versions earlier than 128.13 and 140.1, as well as corresponding Thunderbird versions. The issue arises when a user copies a cURL command from the browser or email client and pastes it into a terminal or command prompt; insufficient escaping can allow an attacker to craft a command that executes arbitrary code on the victim's system. The CVSS v3.1 score is 8.1, reflecting a high severity due to the potential for remote code execution without requiring privileges, though user interaction is necessary. The attack vector is network-based, with low attack complexity and no privileges required. The vulnerability impacts confidentiality and integrity by potentially exposing or altering sensitive data. No patches are linked yet, and no exploits are known in the wild as of the publication date. This vulnerability highlights the risks of features that generate executable commands from user data without proper sanitization.

For European organizations, this vulnerability poses a significant risk to data confidentiality and system integrity, particularly in sectors relying heavily on Firefox and Thunderbird for secure communications, such as finance, government, and healthcare. An attacker could craft malicious web content or emails that exploit the “Copy as cURL” feature to execute arbitrary commands on user machines, potentially leading to data breaches or unauthorized system access. Since user interaction is required, phishing or social engineering campaigns could be used to increase exploitation likelihood. The absence of known exploits currently reduces immediate risk but does not eliminate it, especially as attackers may develop exploits rapidly after public disclosure. The vulnerability does not affect availability, so denial-of-service impacts are unlikely. Organizations with remote or hybrid workforces using vulnerable versions are particularly exposed due to varied update practices and potential exposure to malicious content.

1. Immediately plan and deploy updates to Firefox 141 or later and Thunderbird 141 or later once official patches are released to address CVE-2025-8030. 2. Until patches are available, disable or restrict the use of the “Copy as cURL” feature through browser or client configuration if possible. 3. Educate users about the risks of copying and executing commands from untrusted sources, emphasizing caution with commands copied from emails or websites. 4. Implement endpoint security solutions that monitor and block suspicious command executions originating from user actions. 5. Employ email filtering and web content filtering to reduce exposure to malicious content that could trigger exploitation attempts. 6. Encourage use of application whitelisting to prevent unauthorized code execution. 7. Monitor security advisories from Mozilla and threat intelligence feeds for updates on exploit activity and patches. 8. Conduct phishing awareness training to reduce the risk of social engineering attacks leveraging this vulnerability.