{"answers":{"affected":"14 open source packages ship an affected version, including github.com/mattermost/mattermost/server/v8, github.com/mattermost/mattermost-server and github.com/mattermost/mattermost-server/v5. It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-20033 in the wild and no public exploit code.","fix":"Upgrade github.com/mattermost/mattermost/server/v8 to a fixed version for your release line: 8.0.0-20250102081831-64c566a8280b, 10.0.4, 10.1.4 or 10.2.1.","what":"CVE-2025-20033 is a medium-severity denial of service vulnerability in Mattermost Mattermost Server, published on 9 Jan 2025. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-20033 and fix it if it is affected.\n\nWhat it is: CVE-2025-20033 is a medium-severity denial of service vulnerability in Mattermost Mattermost Server, published on 9 Jan 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-2025-20033 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/mattermost/mattermost/server/v8 (Go): affected all versions; fixed in 8.0.0-20250102081831-64c566a8280b\n- github.com/mattermost/mattermost/server/v8 (Go): affected all versions; fixed in 8.0.0-20250102081831-64c566a8280b\n- github.com/mattermost/mattermost/server/v8 (Go): affected all versions; fixed in 8.0.0-20250102081831-64c566a8280b\n- github.com/mattermost/mattermost/server/v8 (Go): affected from 10.0.0; fixed in 10.0.4\n- github.com/mattermost/mattermost/server/v8 (Go): affected from 10.0.0; fixed in 10.0.4\n- github.com/mattermost/mattermost/server/v8 (Go): affected from 10.1.0; fixed in 10.1.4\n- github.com/mattermost/mattermost/server/v8 (Go): affected from 10.1.0; fixed in 10.1.4\n- github.com/mattermost/mattermost/server/v8 (Go): affected from 10.2.0; fixed in 10.2.1\n- github.com/mattermost/mattermost/server/v8 (Go): affected from 10.2.0; fixed in 10.2.1\n- github.com/mattermost/mattermost/server/v8 (Go): affected from 9.11.0; fixed in 9.11.16\n- github.com/mattermost/mattermost/server/v8 (Go): affected from 9.11.0; fixed in 9.11.16\n- github.com/mattermost/mattermost-server (Go): affected from 10.0.0+incompatible; fixed in 10.0.4+incompatible, 10.1.4+incompatible, 10.2.1+incompatible\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-2025-20033/ (Markdown: https://insights.sbomify.com/CVE-2025-20033/index.md)","id":"CVE-2025-20033","markdown":"https://insights.sbomify.com/CVE-2025-20033/index.md","name":"CVE-2025-20033","record":{"aliases":["GHSA-2549-xh72-qrpm","GO-2025-3379"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Mattermost chat platform","requires_auth":"low_privilege","summary":"Attackers can cause denial of service for users with plugin read permissions by creating posts with specific custom types in Mattermost.","user_interaction":"not_required","vuln_class":"denial_of_service"},"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:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-1287","name":"Improper Validation of Specified Type of Input"}],"description":"Mattermost versions 10.2.0, 9.11.x \u003c= 9.11.5, 10.0.x \u003c= 10.0.3, 10.1.x \u003c= 10.1.3 fail to properly validate post types, which allows attackers to deny service to users with the sysconsole_read_plugins permission via creating a post with the custom_pl_notification type and specific props.","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":"DoS via custom post type for sysconsole plugin readers","id":"CVE-2025-20033","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":"mattermost:mattermost_server","products":["mattermost:mattermost_server"],"type":"denial_of_service","year":"2025"},"n_packages":14,"n_references":1,"next":{"headline":"Information disclosure in Intel(R) Server D50DNP and M50FCP boards","id":"CVE-2025-20034"},"packages":[{"ecosystem":"Go","fixed":["10.0.4+incompatible","10.1.4+incompatible","10.2.1+incompatible"],"introduced":["10.0.0+incompatible","10.1.0+incompatible","10.2.0+incompatible"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","source":"GO-2025-3379"},{"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-2025-3379"},{"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-2025-3379"},{"ecosystem":"Go","fixed":["8.0.0-20250102081831-64c566a8280b"],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":null,"source":"GHSA-2549-xh72-qrpm"},{"ecosystem":"Go","fixed":["8.0.0-20250102081831-64c566a8280b"],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","source":"GHSA-2549-xh72-qrpm"},{"ecosystem":"Go","fixed":["8.0.0-20250102081831-64c566a8280b"],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","source":"GO-2025-3379"},{"ecosystem":"Go","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":null,"source":"GHSA-2549-xh72-qrpm"},{"ecosystem":"Go","fixed":["10.0.4"],"introduced":["10.0.0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","source":"GHSA-2549-xh72-qrpm"},{"ecosystem":"Go","fixed":["10.1.4"],"introduced":["10.1.0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":null,"source":"GHSA-2549-xh72-qrpm"},{"ecosystem":"Go","fixed":["10.1.4"],"introduced":["10.1.0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","source":"GHSA-2549-xh72-qrpm"},{"ecosystem":"Go","fixed":["10.2.1"],"introduced":["10.2.0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":null,"source":"GHSA-2549-xh72-qrpm"},{"ecosystem":"Go","fixed":["10.2.1"],"introduced":["10.2.0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","source":"GHSA-2549-xh72-qrpm"},{"ecosystem":"Go","fixed":["9.11.16"],"introduced":["9.11.0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":null,"source":"GHSA-2549-xh72-qrpm"},{"ecosystem":"Go","fixed":["9.11.16"],"introduced":["9.11.0"],"last_affected":[],"package":"github.com/mattermost/mattermost/server/v8","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8","source":"GHSA-2549-xh72-qrpm"}],"prev":{"headline":"Improper input validation for some Intel(R) PROSet/Wireless WiFi Software for Windows before version 23.100 may allow a privileged user to p","id":"CVE-2025-20032"},"products":["Mattermost"],"published":"2025-01-09","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":"2025-01-09","vendors":["Mattermost"]},"summary":"Attackers can cause denial of service for users with plugin read permissions by creating posts with specific custom types in Mattermost.","url":"https://insights.sbomify.com/CVE-2025-20033/"}