{"id":"CVE-2020-9488","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-9488","generatedAt":"2026-10-27T21:15:53.298Z","title":"Improper validation of certificate with host mismatch in Apache Log4j SMTP appender.","description":"Improper validation of certificate with host mismatch in Apache Log4j SMTP appender. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent through that appender. Fixed in Apache Log4j 2.12.3 and 2.13.1","published":"2020-04-27T16:15:13.000Z","lastModified":"2026-06-17T03:28:02.000Z","status":"Modified","sourceIdentifier":"security@apache.org","cvss":{"version":"3.1","score":3.7,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-295"],"affected":["apache/log4j","oracle/communications application session controller","oracle/communications billing and revenue management","oracle/communications eagle ftp table base retrieval","oracle/communications offline mediation controller","oracle/communications services gatekeeper","oracle/communications unified inventory management","oracle/data integrator","oracle/enterprise manager for peoplesoft","oracle/financial services analytical applications infrastructure","oracle/financial services institutional performance analytics","oracle/financial services market risk measurement and management","oracle/financial services price creation and discovery","oracle/financial services retail customer analytics","oracle/flexcube core banking","oracle/flexcube private banking","oracle/health sciences information manager","oracle/insurance insbridge rating and underwriting","oracle/insurance policy administration j2ee","oracle/insurance rules palette","oracle/jd edwards world security","oracle/oracle goldengate application adapters","oracle/peoplesoft enterprise peopletools","oracle/policy automation","oracle/policy automation connector for siebel","oracle/policy automation for mobile devices","oracle/primavera unifier","oracle/retail advanced inventory planning","oracle/retail assortment planning","oracle/retail bulk data integration","oracle/retail customer management and segmentation foundation","oracle/retail eftlink","oracle/retail insights cloud service suite","oracle/retail integration bus","oracle/retail order broker cloud service","oracle/retail predictive application server","oracle/retail xstore point of service","oracle/siebel apps - marketing","oracle/siebel ui framework","oracle/spatial and graph","oracle/storagetek acsls","oracle/storagetek tape analytics sw tool","oracle/utilities framework","oracle/weblogic server","debian/debian linux","qos/reload4j"],"epss":{"score":0.08216,"percentile":0.94846,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (8.22%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://issues.apache.org/jira/browse/LOG4J2-2819","tags":["Issue Tracking","Mitigation","Patch","Vendor 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List","Third Party Advisory"],"source":"security@apache.org"},{"url":"https://security.netapp.com/advisory/ntap-20200504-0003/","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://www.debian.org/security/2021/dsa-5020","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://www.oracle.com/security-alerts/cpuApr2021.html","tags":["Patch","Third Party Advisory"],"source":"security@apache.org"},{"url":"https://www.oracle.com/security-alerts/cpuapr2022.html","tags":["Patch","Third Party Advisory"],"source":"security@apache.org"},{"url":"https://www.oracle.com/security-alerts/cpujan2021.html","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://www.oracle.com/security-alerts/cpujul2020.html","tags":["Third Party Advisory"],"source":"security@apache.org"},{"url":"https://www.oracle.com/security-alerts/cpuoct2020.html","tags":["Third Party 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BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}