{"answers":{"affected":"20 open source packages ship an affected version, including github.com/mattermost/mattermost-server, github.com/mattermost/mattermost-server/v5 and github.com/mattermost/mattermost-server/v6. It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-49222 in the wild and no public exploit code.","fix":"Upgrade github.com/mattermost/mattermost-server to a fixed version for your release line: 10.10.1, 10.5.9, 10.8.4 or 10.9.3.","what":"CVE-2025-49222 is a medium-severity vulnerability in Mattermost Mattermost Server, published on 21 Aug 2025. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-49222 and fix it if it is affected.\n\nWhat it is: CVE-2025-49222 is a medium-severity vulnerability in Mattermost Mattermost Server, published on 21 Aug 2025. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-49222 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/mattermost/mattermost-server (Go): affected from 10.10.0; fixed in 10.10.1\n- github.com/mattermost/mattermost-server (Go): affected from 10.10.0; fixed in 10.10.1\n- github.com/mattermost/mattermost-server (Go): affected from 10.5.0; fixed in 10.5.9\n- github.com/mattermost/mattermost-server (Go): affected from 10.5.0; fixed in 10.5.9\n- github.com/mattermost/mattermost-server (Go): affected from 10.8.0; fixed in 10.8.4\n- github.com/mattermost/mattermost-server (Go): affected from 10.8.0; fixed in 10.8.4\n- github.com/mattermost/mattermost-server (Go): affected from 10.9.0; fixed in 10.9.3\n- github.com/mattermost/mattermost-server (Go): affected from 10.9.0; fixed in 10.9.3\n- github.com/mattermost/mattermost-server (Go): affected from 9.11.0; fixed in 9.11.18\n- github.com/mattermost/mattermost-server (Go): affected from 9.11.0; fixed in 9.11.18\n- github.com/mattermost/mattermost-server (Go): affected from 9.11.0+incompatible; fixed in 9.11.18+incompatible, 10.5.9+incompatible, 10.8.4+incompatible, 10.9.3+incompatible, 10.10.1+incompatible\n- github.com/mattermost/mattermost-server/v5 (Go): affected all versions; no fix listed\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-49222/ (Markdown: https://insights.sbomify.com/CVE-2025-49222/index.md)","id":"CVE-2025-49222","markdown":"https://insights.sbomify.com/CVE-2025-49222/index.md","name":"CVE-2025-49222","record":{"aliases":["GHSA-q453-638c-h4mr","GO-2025-3904"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","data_modify"],"network_reachable":"yes","non_default_config":true,"product_category":"Mattermost collaboration platform","requires_auth":"high_privilege","summary":"System admins can bypass upload type validation in shared channels to place arbitrary files in filesystem directories, potentially leading to code execution.","user_interaction":"not_required","vuln_class":"file_upload"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Mattermost","cpe":[{"product":"mattermost_server","vendor":"mattermost"}],"cvss":{"score":6.8,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-434","name":"Unrestricted Upload of File with Dangerous Type"}],"description":"Mattermost versions 10.8.x \u003c= 10.8.3, 10.5.x \u003c= 10.5.8, 9.11.x \u003c= 9.11.17, 10.9.x \u003c= 10.9.2, 10.10.x \u003c= 10.10.0 fail to validate upload types in remote cluster upload sessions which allows a system admin to upload non-attachment file types via shared channels that could potentially be placed in arbitrary filesystem directories.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Mattermost Shared Channel Upload Type Validation Bypass","id":"CVE-2025-49222","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":"mattermost:mattermost_server","products":["mattermost:mattermost_server"],"type":"file_upload","year":"2025"},"n_packages":20,"n_references":1,"next":{"headline":"billboard.js allows prototype pollution via the function generate","id":"CVE-2025-49223"},"packages":[{"ecosystem":"Go","fixed":["10.10.1"],"introduced":["10.10.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":null,"source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":["10.10.1"],"introduced":["10.10.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":["10.5.9"],"introduced":["10.5.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":null,"source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":["10.5.9"],"introduced":["10.5.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":["10.8.4"],"introduced":["10.8.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":null,"source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":["10.8.4"],"introduced":["10.8.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":["10.9.3"],"introduced":["10.9.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":null,"source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":["10.9.3"],"introduced":["10.9.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":["9.11.18"],"introduced":["9.11.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":null,"source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":["9.11.18"],"introduced":["9.11.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":["9.11.18+incompatible","10.5.9+incompatible","10.8.4+incompatible","10.9.3+incompatible","10.10.1+incompatible"],"introduced":["9.11.0+incompatible","10.5.0+incompatible","10.8.0+incompatible","10.9.0+incompatible","10.10.0+incompatible"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","source":"GO-2025-3904"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server/v5","purl":"pkg:golang/github.com/mattermost/mattermost-server/v5","source":"GO-2025-3904"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["5.39.3"],"package":"github.com/mattermost/mattermost-server/v5","purl":null,"source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["5.39.3"],"package":"github.com/mattermost/mattermost-server/v5","purl":"pkg:golang/github.com/mattermost/mattermost-server/v5","source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server/v6","purl":"pkg:golang/github.com/mattermost/mattermost-server/v6","source":"GO-2025-3904"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["5.7.2"],"package":"github.com/mattermost/mattermost-server/v6","purl":null,"source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["5.7.2"],"package":"github.com/mattermost/mattermost-server/v6","purl":"pkg:golang/github.com/mattermost/mattermost-server/v6","source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","source":"GO-2025-3904"},{"ecosystem":"Go","fixed":["8.0.0-20250708173752-d6b35c41f0ae5"],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":null,"source":"GHSA-q453-638c-h4mr"},{"ecosystem":"Go","fixed":["8.0.0-20250708173752-d6b35c41f0ae5"],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","source":"GHSA-q453-638c-h4mr"}],"prev":{"headline":"Unauthenticated Access to Channel Subscription in Mattermost Confluence Plugin","id":"CVE-2025-49221"},"products":["Mattermost"],"published":"2025-08-21","related":[{"cvss_score":9.9,"headline":"Account takeover on OAuth/OpenID-enabled servers","id":"CVE-2025-12419","kev_date_added":null,"published":"2025-11-27"},{"cvss_score":9.9,"headline":"Account Takeover via Code Exchange Endpoint","id":"CVE-2025-12421","kev_date_added":null,"published":"2025-11-27"},{"cvss_score":9.9,"headline":"Path Traversal Leading to RCE by Any Authenticated Mattermost User","id":"CVE-2025-4981","kev_date_added":null,"published":"2025-06-20"},{"cvss_score":9.9,"headline":"Arbitrary file read via block duplication in Mattermost Boards","id":"CVE-2025-20051","kev_date_added":null,"published":"2025-02-24"},{"cvss_score":9.9,"headline":"Arbitrary file read in Mattermost Boards via import \u0026 export board archive","id":"CVE-2025-25279","kev_date_added":null,"published":"2025-02-24"},{"cvss_score":9.8,"headline":"Mattermost Server: Insufficient Password-Reset Link Invalidation","id":"CVE-2016-11074","kev_date_added":null,"published":"2020-06-19"},{"cvss_score":9.8,"headline":"Mattermost Server allows attackers to gain privileges by accessing unintended API endpoints with users' credentials","id":"CVE-2017-18885","kev_date_added":null,"published":"2020-06-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-08-21","vendors":["Mattermost"]},"summary":"System admins can bypass upload type validation in shared channels to place arbitrary files in filesystem directories, potentially leading to code execution.","url":"https://insights.sbomify.com/CVE-2025-49222/"}