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CVE-2025-4089: Due to insufficient escaping of special characters in the "copy as cURL" feature, an attacker could trick a user into using this command,...

5.1 CVSS

Description

Due to insufficient escaping of special characters 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 < 138 and Thunderbird < 138.

Classification

CVE ID: CVE-2025-4089

CVSS Base Severity: MEDIUM

CVSS Base Score: 5.1

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Problem Types

Potential local code execution in "copy as cURL" command

Affected Products

Vendor: Mozilla

Product: Firefox, Thunderbird

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.02% (probability of being exploited)

EPSS Percentile: 4.72% (scored less or equal to compared to others)

EPSS Date: 2025-05-28 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-4089
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1949994%2C1956698%2C1960198
https://www.mozilla.org/security/advisories/mfsa2025-28/
https://www.mozilla.org/security/advisories/mfsa2025-31/

Timeline