CVE-2025-8031

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{"affected_release": [{"advisory": "RHSA-2025:11797", "cpe": "cpe:/o:redhat:enterprise_linux:10.0", "package": "firefox-0:128.13.0-1.el10_0", "product_name": "Red Hat Enterprise Linux 10", "release_date": "2025-07-28T00:00:00Z"}, {"advisory": "RHSA-2025:11747", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "firefox-0:128.13.0-1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2025-07-24T00:00:00Z"}, {"advisory": "RHSA-2025:11748", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "firefox-0:128.13.0-1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-07-24T00:00:00Z"}], "bugzilla": {"description": "firefox: thunderbird: Incorrect URL stripping in CSP reports", "id": "2382704", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2382704"}, "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": "verified"}, "cwe": "CWE-276", "details": ["The `username:password` part was not correctly stripped from URLs in CSP reports potentially leaking HTTP Basic Authentication credentials. This vulnerability affects Firefox < 141, Firefox ESR < 128.13, Firefox ESR < 140.1, Thunderbird < 141, Thunderbird < 128.13, and Thunderbird < 140.1.", "A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:\nThe <code>username:password</code> part is incorrectly stripped from URLs in CSP reports, potentially leaking HTTP Basic Authentication credentials."], "name": "CVE-2025-8031", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/firefox-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/thunderbird-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-07-22T20:49:26Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-8031\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-8031\nhttps://www.mozilla.org/security/advisories/mfsa2025-58/#CVE-2025-8031\nhttps://www.mozilla.org/security/advisories/mfsa2025-62/#CVE-2025-8031"], "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": "2026-04-20T18:05:19.763045+00:00", "value": {"mitigation_remediation": ["Upgrade to Firefox 141 or newer, including ESR 128.13 or 140.1 releases", "Upgrade to Thunderbird 141 or newer, including ESR 128.13 or 140.1 releases", "If immediate upgrade is not possible, temporarily disable CSP violation reporting in the browser settings or block the reporting endpoint through network controls"], "summary": {"action": "Immediate Patch", "impact": "Confidentiality breach through leaked credentials"}, "threat_synthesis": {"affected_systems": "Mozilla browsers, specifically Firefox versions prior to 141, Firefox ESR 128.13 and 140.1, and Thunderbird versions prior to 141, Thunderbird ESR 128.13 and 140.1, are impacted. Any system running these browser builds, including installations on Red Hat Enterprise Linux 8, 9, or 10 environments, may be vulnerable.", "description_and_impact": "The vulnerability arises from improper removal of username and password information from URLs in Content Security Policy (CSP) violation reports, allowing attackers to capture HTTP Basic Authentication credentials. This flaw can compromise user confidentiality by exposing account credentials to malicious actors, increasing the risk of account takeover or broader system compromise. The weakness is categorized as CWE\u2011276, indicating incorrect assignment or handling of sensitive information.", "risk_and_exploitability": "The CVSS score of 9.8 classifies this as a critical vulnerability, yet the EPSS score of less than 1% points to a low current likelihood of exploitation. It is not listed in CISA\u2019s KEV catalog. The likely attack scenario involves a remote attacker serving a malicious web page that triggers a CSP violation, causing the browser to generate a report that inadvertently exposes credentials. Once exposed, the attacker could obtain and use the victim's authentication tokens to access protected resources."}}}}, "created": "2025-07-23T17:36:02.134616+00:00", "updated": "2026-04-20T18:15:13.615220+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox", "mozilla$PRODUCT$firefox_esr", "mozilla$PRODUCT$thunderbird"]}