CVE-2025-5265

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{"bugzilla": {"description": "firefox: thunderbird: Potential local code execution in \u201cCopy as cURL\u201d command", "id": "2368748", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2368748"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-116", "details": ["Due to insufficient escaping of the ampersand character in the \u201cCopy as cURL\u201d feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system.\n*This bug only affects Firefox for Windows. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 139, Firefox ESR < 115.24, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11.", "A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Due to insufficient escaping of the ampersand character in the \u201cCopy as cURL\u201d feature, an attacker could trick a user into using this command, leading to local code execution on the user's system."], "name": "CVE-2025-5265", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "rhel10/firefox-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "rhel10/thunderbird-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-27T12:29:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-5265\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-5265\nhttps://bugzilla.mozilla.org/show_bug.cgi?id=1962301\nhttps://www.mozilla.org/security/advisories/mfsa2025-42/\nhttps://www.mozilla.org/security/advisories/mfsa2025-43/\nhttps://www.mozilla.org/security/advisories/mfsa2025-44/"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Moderate"}

{"analysis": {"en": {"generated_at": "2026-04-20T17:06:42.958573+00:00", "value": {"mitigation_remediation": ["Update Mozilla Firefox to version 139 or later, or to a patched ESR release such as 115.24 or 128.11.", "Update Mozilla Thunderbird to version 139 or later, or to a patched ESR release such as 128.11.", "Continuously monitor Mozilla security advisories to ensure any future patches are applied promptly."], "summary": {"action": "Patch", "impact": "Local code execution"}, "threat_synthesis": {"affected_systems": "Mozilla Firefox for Windows is affected, with the issue fixed in version 139 and Firefox ESR 115.24 and 128.11. Mozilla Thunderbird is also affected and was patched in version 139 and Thunderbird ESR 128.11. Users running older builds of these browsers face the risk of exploitation.", "description_and_impact": "The vulnerability arises from insufficient escaping of the ampersand character in the \u201cCopy as cURL\u201d feature, which allows an attacker to trick a user into executing a crafted command that can run arbitrary code locally. This flaw can lead to a complete compromise of the user\u2019s system, exposing confidential data or allowing further malicious activity. The weakness is reflected in CWE\u2011116 and CWE\u201177, indicating improper string handling and potential command injection.", "risk_and_exploitability": "The CVSS score of 4.8 indicates a moderate severity, and the EPSS score of less than 1% shows a very low likelihood of exploitation in the wild. The vulnerability is not listed in CISA KEV, further suggesting it has not been widely exploited. The attack requires user interaction to trigger the Copy as cURL command, making it a local, user\u2011dependent threat rather than a remote capability."}}}}, "created": "2026-04-20T17:15:12.549346+00:00", "updated": "2026-04-20T17:15:12.549357+00:00", "vendors": []}