{"cve":"CVE-2025-31363","nvd":{"published":"2025-04-16T10:15:15.170","modified":"2026-06-17T09:10:17.710","status":"Analyzed","description":"Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.9 fail to restrict domains the LLM can request to contact upstream which allows an authenticated user to exfiltrate data from an arbitrary server accessible to the victim via performing a prompt injection in the AI plugin's Jira tool.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5},"cwes":[],"references":["https://mattermost.com/security-updates"],"products":["mattermost:mattermost_server"],"source":"nvd","synced_at":"2026-10-19T22:01:11.054312287+00:00"},"epss":{"cve":"CVE-2025-31363","score":0.00288,"percentile":0.21411,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-9h6j-4ffx-cm84","url":"https://osv.dev/vulnerability/GHSA-9h6j-4ffx-cm84","summary":"Mattermost doesn't restrict domains LLM can request to contact upstream","modified":"2026-09-10T03:50:23.730824923Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":[">=10.5.0 <10.5.1"],"fixed":["10.5.1"]},{"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":[">=9.11.0 <9.11.10"],"fixed":["9.11.10"]},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","ranges":["<8.0.0-20250218121836-2b5275d87136"],"fixed":["8.0.0-20250218121836-2b5275d87136"]}]},{"id":"GO-2025-3622","url":"https://osv.dev/vulnerability/GO-2025-3622","summary":"Mattermost doesn't restrict domains LLM can request to contact upstream in github.com/mattermost/mattermost-server","modified":"2026-02-04T03:42:20.097738Z","packages":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","ranges":[">=9.11.0+incompatible <9.11.10+incompatible",">=10.4.0+incompatible <10.4.3+incompatible",">=10.5.0+incompatible <10.5.1+incompatible"],"fixed":["9.11.10+incompatible","10.4.3+incompatible","10.5.1+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":["<8.0.0-20250218121836-2b5275d87136"],"fixed":["8.0.0-20250218121836-2b5275d87136"]}]}],"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."]}