CVE-2025-5264
MediumCVSS 4.8Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
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 was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.
Risk Assessment
An attacker could exploit this vulnerability to execute malicious code on the victim's machine, potentially leading to full system compromise.
Recommendation
Update Firefox or Thunderbird to a version that includes the fix. Avoid using the “Copy as cURL” feature from untrusted sources.
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Original NVD description (English source)
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 was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS