{"cve":"CVE-2025-27933","nvd":{"published":"2025-03-21T09:15:13.260","modified":"2026-06-17T09:04:24.913","status":"Analyzed","description":"Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to fail to enforce channel conversion restrictions, which allows members with permission to convert public channels to private ones to also convert private ones to public","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3},"cwes":["CWE-863"],"references":["https://mattermost.com/security-updates"],"products":["mattermost:mattermost_server"],"source":"nvd","synced_at":"2026-10-19T22:00:28.034033815+00:00"},"epss":{"cve":"CVE-2025-27933","score":0.00211,"percentile":0.11381,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-h5v9-xw2g-7hrq","url":"https://osv.dev/vulnerability/GHSA-h5v9-xw2g-7hrq","summary":"Mattermost allows members with permission to convert public channels to private and convert private to public","modified":"2026-09-10T03:50:23.194301319Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":[">=10.4.0 <10.4.3"],"fixed":["10.4.3"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":[">=10.3.0 <10.3.4"],"fixed":["10.3.4"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":[">=9.11.0 <9.11.9"],"fixed":["9.11.9"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":["<9.11.9"],"fixed":["9.11.9"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":["<8.0.0-20250218135018-e644e3c8e393"],"fixed":["8.0.0-20250218135018-e644e3c8e393"]}]},{"id":"GO-2025-3556","url":"https://osv.dev/vulnerability/GO-2025-3556","summary":"Mattermost allows members with permission to convert public channels to private and convert private to public in github.com/mattermost/mattermost-server","modified":"2026-02-04T03:38:37.008945Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=9.11.0+incompatible <9.11.9+incompatible",">=10.3.0+incompatible <10.3.4+incompatible",">=10.4.0+incompatible <10.4.3+incompatible"],"fixed":["9.11.9+incompatible","10.3.4+incompatible","10.4.3+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":["<8.0.0-20250218135018-e644e3c8e393"],"fixed":["8.0.0-20250218135018-e644e3c8e393"]}]}],"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."]}