{"answers":{"affected":"14 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-2025-13767 in the wild and no public exploit code.","fix":"Upgrade github.com/mattermost/mattermost-server to a fixed version for your release line: 10.11.8, 10.11.8+incompatible, 10.12.4+incompatible or 11.0.6+incompatible.","what":"CVE-2025-13767 is a medium-severity missing authorization vulnerability in Mattermost Mattermost Server, published on 24 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-13767 and fix it if it is affected.\n\nWhat it is: CVE-2025-13767 is a medium-severity missing authorization vulnerability in Mattermost Mattermost Server, published on 24 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-13767 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/mattermost/mattermost-server (Go): affected from 10.11.0; fixed in 10.11.8\n- github.com/mattermost/mattermost-server (Go): affected from 10.11.0; fixed in 10.11.8\n- github.com/mattermost/mattermost-server (Go): affected from 10.11.0+incompatible; fixed in 10.11.8+incompatible, 10.12.4+incompatible, 11.0.6+incompatible, 11.1.1+incompatible\n- github.com/mattermost/mattermost-server (Go): affected from 10.12.0; fixed in 10.12.4\n- github.com/mattermost/mattermost-server (Go): affected from 10.12.0; fixed in 10.12.4\n- github.com/mattermost/mattermost-server (Go): affected from 11.0.0; fixed in 11.0.6\n- github.com/mattermost/mattermost-server (Go): affected from 11.0.0; fixed in 11.0.6\n- github.com/mattermost/mattermost-server (Go): affected from 11.1.0; fixed in 11.1.1\n- github.com/mattermost/mattermost-server (Go): affected from 11.1.0; fixed in 11.1.1\n- github.com/mattermost/mattermost-server/v5 (Go): affected all versions; no fix listed\n- github.com/mattermost/mattermost-server/v6 (Go): affected all versions; no fix listed\n- github.com/mattermost/mattermost/server/v8 (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-2025-13767/ (Markdown: https://insights.sbomify.com/CVE-2025-13767/index.md)","id":"CVE-2025-13767","markdown":"https://insights.sbomify.com/CVE-2025-13767/index.md","name":"CVE-2025-13767","record":{"aliases":["GHSA-fmqf-pmcm-8cx9","GO-2025-4259"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Mattermost Jira plugin","requires_auth":"low_privilege","summary":"An authenticated attacker can read private channel posts and attachments via the Jira plugin due to missing channel membership validation.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Mattermost","cpe":[{"product":"mattermost_server","vendor":"mattermost"}],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"}],"description":"Mattermost versions 11.1.x \u003c= 11.1.0, 11.0.x \u003c= 11.0.5, 10.12.x \u003c= 10.12.3, 10.11.x \u003c= 10.11.7 fails to validate user channel membership when attaching Mattermost posts as comments to Jira issues, which allows an authenticated attacker with access to the Jira plugin to read post content and attachments from channels they do not have access to.","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":"Unauthorized Read Access to Private Channel Posts via Mattermost Jira Plugin","id":"CVE-2025-13767","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":"mattermost:mattermost_server","products":["mattermost:mattermost_server"],"type":"missing_authorization","year":"2025"},"n_packages":14,"n_references":1,"next":{"headline":"Uniong｜WebITR - Authorization Bypass","id":"CVE-2025-13768"},"packages":[{"ecosystem":"Go","fixed":["10.11.8"],"introduced":["10.11.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":null,"source":"GHSA-fmqf-pmcm-8cx9"},{"ecosystem":"Go","fixed":["10.11.8"],"introduced":["10.11.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","source":"GHSA-fmqf-pmcm-8cx9"},{"ecosystem":"Go","fixed":["10.11.8+incompatible","10.12.4+incompatible","11.0.6+incompatible","11.1.1+incompatible"],"introduced":["10.11.0+incompatible","10.12.0+incompatible","11.0.1+incompatible","11.1.0+incompatible"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","source":"GO-2025-4259"},{"ecosystem":"Go","fixed":["10.12.4"],"introduced":["10.12.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":null,"source":"GHSA-fmqf-pmcm-8cx9"},{"ecosystem":"Go","fixed":["10.12.4"],"introduced":["10.12.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","source":"GHSA-fmqf-pmcm-8cx9"},{"ecosystem":"Go","fixed":["11.0.6"],"introduced":["11.0.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":null,"source":"GHSA-fmqf-pmcm-8cx9"},{"ecosystem":"Go","fixed":["11.0.6"],"introduced":["11.0.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","source":"GHSA-fmqf-pmcm-8cx9"},{"ecosystem":"Go","fixed":["11.1.1"],"introduced":["11.1.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":null,"source":"GHSA-fmqf-pmcm-8cx9"},{"ecosystem":"Go","fixed":["11.1.1"],"introduced":["11.1.0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","source":"GHSA-fmqf-pmcm-8cx9"},{"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-2025-4259"},{"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-2025-4259"},{"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-2025-4259"},{"ecosystem":"Go","fixed":["8.0.0-20251121122154-b57c297c6d7"],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":null,"source":"GHSA-fmqf-pmcm-8cx9"},{"ecosystem":"Go","fixed":["8.0.0-20251121122154-b57c297c6d7"],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","source":"GHSA-fmqf-pmcm-8cx9"}],"prev":{"headline":"Missing authorization in MasterStudy LMS WordPress Plugin – for Online Courses and Education","id":"CVE-2025-13766"},"products":["Mattermost"],"published":"2025-12-24","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":"2025-12-24","vendors":["Mattermost"]},"summary":"An authenticated attacker can read private channel posts and attachments via the Jira plugin due to missing channel membership validation.","url":"https://insights.sbomify.com/CVE-2025-13767/"}