CVE-2025-5272

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{"affected": [{"affectedData": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "*", "status": "unaffected", "version": "139", "versionType": "rpm"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "*", "status": "unaffected", "version": "139", "versionType": "rpm"}]}], "source": "security@mozilla.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*", "matchCriteriaId": "82C74587-41B7-49DB-8B9D-99DE41506023", "versionEndExcluding": "139.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*", "matchCriteriaId": "2BC51636-40B4-4FB9-975F-CBF61A91A8AC", "versionEndExcluding": "139.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Memory safety bugs present in Firefox 138 and Thunderbird 138. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 139 and Thunderbird 139."}, {"lang": "es", "value": "Errores de seguridad de memoria presentes en Firefox 138 y Thunderbird 138. Algunos de estos errores mostraron evidencia de corrupci\u00f3n de memoria y presumimos que, con suficiente esfuerzo, algunos de ellos podr\u00edan haberse explotado para ejecutar c\u00f3digo arbitrario. Esta vulnerabilidad afecta a Firefox anterior a la versi\u00f3n 139."}], "id": "CVE-2025-5272", "lastModified": "2026-09-30T18:10:00.190", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-5272", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-05-27T15:05:49.340623Z", "version": "2.0.3"}}]}, "published": "2025-05-27T13:15:23.023", "references": [{"source": "security@mozilla.org", "tags": ["Broken Link"], "url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1726254%2C1742738%2C1960121"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-42/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2025-45/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "firefox: Memory safety bugs", "id": "2368754", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2368754"}, "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-119", "details": ["Memory safety bugs present in Firefox 138 and Thunderbird 138. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 139 and Thunderbird < 139.", "A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Some memory bugs show evidence of memory corruption, and we presume that with enough effort, some of these could be exploited to run arbitrary code."], "name": "CVE-2025-5272", "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:6", "fix_state": "Out of support scope", "package_name": "firefox", "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:8", "fix_state": "Not affected", "package_name": "firefox", "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"}], "public_date": "2025-05-27T12:29:30Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-5272\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-5272\nhttps://bugzilla.mozilla.org/buglist.cgi?bug_id=1726254%2C1742738%2C1960121\nhttps://www.mozilla.org/security/advisories/mfsa2025-42/"], "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": "2026-04-20T17:03:46.154770+00:00", "value": {"mitigation_remediation": ["Upgrade to Firefox 139 or Thunderbird 139 as per vendor advisories.", "Disable or uninstall any third\u2011party add\u2011ons that are not essential and run in privileged context, as they could be leveraged by memory corruption exploits.", "Enable detailed logging for these applications and periodically review logs for signs of exploitation attempts."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "Mozilla Firefox 138 and Mozilla Thunderbird 138 are affected. All installations of these products that have not been updated to version 139 or newer remain vulnerable. The vulnerability is specific to the Firefox and Thunderbird codebases.", "description_and_impact": "This CVE describes memory safety bugs in Firefox 138 and Thunderbird 138 that can corrupt memory. The vendor notes that some bugs provided evidence of memory corruption and the possibility of arbitrary code execution with enough effort. The weaknesses correspond to buffer overflows (CWE-119) and out\u2011of\u2011bounds writes (CWE-787).", "risk_and_exploitability": "The CVSS score is 7.3, indicating substantial severity. The EPSS score is below 1\u202f%, suggesting that at the time of analysis the likelihood of exploitation was considered low. The vulnerability is not listed in the CISA KEV catalog. Exploitation would require an attacker to deliver crafted content to the application, such as a malicious web page or email, to trigger the memory corruption, which could in turn allow arbitrary code execution. No specific prerequisites beyond the vulnerable client are noted, so the attack could target any user of the affected versions."}}}}, "created": "2026-04-20T17:15:12.548049+00:00", "updated": "2026-04-20T17:15:12.548061+00:00", "vendors": []}