{"cve":"CVE-2018-21018","nvd":{"published":"2019-09-22T15:15:13.657","modified":"2026-06-17T01:53:58.000","status":"Modified","description":"Mastodon before 2.6.3 mishandles timeouts of incompletely established sessions.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-613"],"references":["https://github.com/tootsuite/mastodon/pull/9329","https://github.com/tootsuite/mastodon/pull/9381","https://github.com/tootsuite/mastodon/releases/tag/v2.6.2","https://github.com/tootsuite/mastodon/releases/tag/v2.6.3","https://github.com/tootsuite/mastodon/pull/9329"],"products":["joinmastodon:mastodon"],"source":"nvd","synced_at":"2026-10-19T20:59:10.855360465+00:00"},"epss":{"cve":"CVE-2018-21018","score":0.02561,"percentile":0.85104,"date":"2026-10-31"},"kev":null,"osv":[],"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."]}