{"cve":"CVE-2023-20866","nvd":{"published":"2023-04-13T20:15:08.263","modified":"2026-06-17T05:31:03.210","status":"Modified","description":"In Spring Session version 3.0.0, the session id can be logged to the standard output stream. This vulnerability exposes sensitive information to those who have access to the application logs and can be used for session hijacking. Specifically, an application is vulnerable if it is using HeaderHttpSessionIdResolver.","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-200"],"references":["https://spring.io/security/cve-2023-20866","https://spring.io/security/cve-2023-20866"],"products":["vmware:spring_session"],"source":"nvd","synced_at":"2026-10-19T21:38:05.473481323+00:00"},"epss":{"cve":"CVE-2023-20866","score":0.0066,"percentile":0.51606,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-r7qr-f43m-pxfr","url":"https://osv.dev/vulnerability/GHSA-r7qr-f43m-pxfr","summary":"Spring Session session ID can be logged to the standard output stream","modified":"2023-11-08T04:11:22.567296Z","packages":[{"ecosystem":"Maven","name":"org.springframework.session:spring-session-core","purl":"pkg:maven/org.springframework.session/spring-session-core","ranges":[">=3.0.0 <3.0.1"],"fixed":["3.0.1"]}]}],"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."]}