{"cve":"CVE-2017-18904","nvd":{"published":"2020-06-19T19:15:11.763","modified":"2026-06-17T01:13:48.203","status":"Modified","description":"An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2. It allows XSS via an uploaded file.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"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-2017-18904","score":0.0069,"percentile":0.52821,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8pff-p3gx-w4jf","url":"https://osv.dev/vulnerability/GHSA-8pff-p3gx-w4jf","summary":" Mattermost Server vulnerable to XSS via an uploaded file","modified":"2026-02-03T03:01:55.912139Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":["<3.9.2"],"fixed":["3.9.2"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=3.10.0 <3.10.2"],"fixed":["3.10.2"]}]},{"id":"GO-2026-4302","url":"https://osv.dev/vulnerability/GO-2026-4302","summary":"Mattermost Server vulnerable to XSS via an uploaded file in github.com/mattermost/mattermost-server","modified":"2026-03-03T04:57:53.378340Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":["<3.9.2+incompatible",">=3.10.0+incompatible <3.10.2+incompatible"],"fixed":["3.9.2+incompatible","3.10.2+incompatible"]}]}],"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."]}