{"cve":"CVE-2019-25025","nvd":{"published":"2021-03-05T06:15:12.690","modified":"2026-06-17T02:31:30.247","status":"Modified","description":"The activerecord-session_store (aka Active Record Session Store) component through 1.1.3 for Ruby on Rails does not use a constant-time approach when delivering information about whether a guessed session ID is valid. Consequently, remote attackers can leverage timing discrepancies to achieve a correct guess in a relatively short amount of time. This is a related issue to CVE-2019-16782.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":[],"references":["https://github.com/rails/activerecord-session_store/pull/151","https://github.com/rails/activerecord-session_store/pull/151"],"products":["rubyonrails:active_record_session_store"],"source":"nvd","synced_at":"2026-10-19T21:15:50.279857260+00:00"},"epss":{"cve":"CVE-2019-25025","score":0.01835,"percentile":0.78933,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-cvw2-xj8r-mjf7","url":"https://osv.dev/vulnerability/GHSA-cvw2-xj8r-mjf7","summary":"Activerecord-session_store Vulnerable to Timing Attack","modified":"2024-02-16T08:10:03.472082Z","packages":[{"ecosystem":"RubyGems","name":"activerecord-session_store","purl":"pkg:gem/activerecord-session_store","ranges":["<2.0.0"],"fixed":["2.0.0"]}]}],"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."]}