{"cve":"CVE-2020-14457","nvd":{"published":"2020-06-19T14:15:11.840","modified":"2026-06-17T02:54:48.687","status":"Modified","description":"An issue was discovered in Mattermost Server before 5.20.0. Non-members can receive broadcasted team details via the update_team WebSocket event, aka MMSA-2020-0012.","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://mattermost.com/security-updates/","https://mattermost.com/security-updates/"],"products":["mattermost:mattermost_server"],"source":"nvd","synced_at":"2026-10-19T21:05:42.039641217+00:00"},"epss":{"cve":"CVE-2020-14457","score":0.0092,"percentile":0.60287,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-j2h2-cvwh-cr64","url":"https://osv.dev/vulnerability/GHSA-j2h2-cvwh-cr64","summary":"Mattermost Server Sensitive Data Exposure","modified":"2025-08-14T21:22:40Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v5","purl":"pkg:golang/github.com/mattermost/mattermost-server/v5","ranges":["<5.20.0"],"fixed":["5.20.0"]}]},{"id":"GO-2023-1939","url":"https://osv.dev/vulnerability/GO-2023-1939","summary":"Mattermost Server Sensitive Data Exposure in github.com/mattermost/mattermost","modified":"2026-03-03T04:54:01.041230Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost","purl":"pkg:golang/github.com/mattermost/mattermost","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v5","purl":"pkg:golang/github.com/mattermost/mattermost-server/v5","ranges":["<5.20.0"],"fixed":["5.20.0"]}]}],"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."]}