{"cve":"CVE-2024-39836","nvd":{"published":"2024-08-22T07:15:03.960","modified":"2026-06-17T07:42:53.517","status":"Analyzed","description":"Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 and 9.8.x <= 9.8.2 fail to  ensure that remote/synthetic users cannot create sessions or reset passwords, which allows the munged email addresses, created by shared channels, to be used to receive email notifications and to reset passwords, when they are valid, functional emails.","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:L/A:N","score":6.5},"cwes":["CWE-693"],"references":["https://mattermost.com/security-updates"],"products":["mattermost:mattermost"],"source":"nvd","synced_at":"2026-10-19T21:54:16.205165117+00:00"},"epss":{"cve":"CVE-2024-39836","score":0.00261,"percentile":0.17977,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-c6vp-jjgv-38wj","url":"https://osv.dev/vulnerability/GHSA-c6vp-jjgv-38wj","summary":"Mattermost allows remote/synthetic users to create sessions, reset passwords","modified":"2024-08-30T17:42:33.698195Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":[">=9.9.0 <9.9.2"],"fixed":["9.9.2"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":[">=9.5.0 <9.5.8"],"fixed":["9.5.8"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":[">=9.10.0 <9.10.1"],"fixed":["9.10.1"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":[">=9.8.0 <9.8.3"],"fixed":["9.8.3"]}]},{"id":"GO-2024-3096","url":"https://osv.dev/vulnerability/GO-2024-3096","summary":"Mattermost allows remote/synthetic users to create sessions, reset passwords in github.com/mattermost/mattermost-server","modified":"2026-03-03T04:55:46.625208Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=9.5.0+incompatible <9.5.8+incompatible",">=9.8.0+incompatible <9.8.3+incompatible",">=9.9.0+incompatible <9.9.2+incompatible",">=9.10.0+incompatible <9.10.1+incompatible"],"fixed":["9.5.8+incompatible","9.8.3+incompatible","9.9.2+incompatible","9.10.1+incompatible"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v5","purl":"pkg:golang/github.com/mattermost/mattermost-server/v5","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v6","purl":"pkg:golang/github.com/mattermost/mattermost-server/v6","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":["all versions"],"fixed":[]}]}],"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."]}