CVE-2025-5265
low-risk
Published 2025-05-27
Due to insufficient escaping of the ampersand 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 bug only affects Firefox for Windows. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.
Do I need to act?
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0.06% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.8/10
Medium
LOCAL
/ LOW complexity
Affected Vendors
References (6)
Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1962301
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-42/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-43/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-44/
23
/ 100
low-risk
Severity
16/34 · Moderate
Exploitability
0/34 · Minimal
Exposure
7/34 · Low