{"cve":"CVE-2020-5408","nvd":{"published":"2020-05-14T18:15:12.250","modified":"2026-06-17T03:21:26.323","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-330","CWE-329"],"references":["https://tanzu.vmware.com/security/cve-2020-5408","https://www.oracle.com/security-alerts/cpuApr2021.html","https://www.oracle.com/security-alerts/cpujan2021.html","https://www.oracle.com/security-alerts/cpuoct2020.html","https://tanzu.vmware.com/security/cve-2020-5408"],"products":["pivotal_software:spring_security","vmware:spring_security"],"source":"nvd","synced_at":"2026-10-19T21:04:18.695612450+00:00"},"epss":{"cve":"CVE-2020-5408","score":0.01594,"percentile":0.7572,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2ppp-9496-p23q","url":"https://osv.dev/vulnerability/GHSA-2ppp-9496-p23q","summary":"Insufficient Entropy in Spring Security","modified":"2023-11-08T04:03:55.286737Z","packages":[{"ecosystem":"Maven","name":"org.springframework.security:spring-security-core","purl":"pkg:maven/org.springframework.security/spring-security-core","ranges":[">=5.3.0 <5.3.2"],"fixed":["5.3.2"]},{"ecosystem":"Maven","name":"org.springframework.security:spring-security-core","purl":"pkg:maven/org.springframework.security/spring-security-core","ranges":[">=5.2.0 <5.2.4"],"fixed":["5.2.4"]},{"ecosystem":"Maven","name":"org.springframework.security:spring-security-core","purl":"pkg:maven/org.springframework.security/spring-security-core","ranges":[">=5.1.0 <5.1.10"],"fixed":["5.1.10"]},{"ecosystem":"Maven","name":"org.springframework.security:spring-security-core","purl":"pkg:maven/org.springframework.security/spring-security-core","ranges":[">=5.0.0 <5.0.16"],"fixed":["5.0.16"]},{"ecosystem":"Maven","name":"org.springframework.security:spring-security-core","purl":"pkg:maven/org.springframework.security/spring-security-core","ranges":["<4.2.16"],"fixed":["4.2.16"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}