{"id":"CVE-2020-5408","aliases":["GHSA-2ppp-9496-p23q"],"url":"https://o3.security/vulnerability/CVE-2020-5408","summary":"Insufficient Entropy in Spring Security","details":"Spring Security versions 5.3.x prior to 5.3.2, 5.2.x prior to 5.2.4, 5.1.x prior to 5.1.10, 5.0.x prior to 5.0.16 and 4.2.x prior to 4.2.16 use a fixed null initialization vector with CBC Mode in the implementation of the queryable text encryptor. A malicious user with access to the data that has been encrypted using such an encryptor may be able to derive the unencrypted values using a dictionary attack.","published":"2020-05-14T18:15:12.250Z","modified":"2026-07-08T05:58:48.119032269Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.springframework.security:spring-security-core","fixedVersion":"5.3.2"},{"ecosystem":"Maven","name":"org.springframework.security:spring-security-core","fixedVersion":"5.2.4"},{"ecosystem":"Maven","name":"org.springframework.security:spring-security-core","fixedVersion":"5.1.10"},{"ecosystem":"Maven","name":"org.springframework.security:spring-security-core","fixedVersion":"5.0.16"},{"ecosystem":"Maven","name":"org.springframework.security:spring-security-core","fixedVersion":"4.2.16"}],"fix":null,"references":[{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpuApr2021.html"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpujan2021.html"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpuoct2020.html"},{"type":"ADVISORY","url":"https://tanzu.vmware.com/security/cve-2020-5408"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:58:48.119032269Z"}}