{"answers":{"affected":"4 open source packages ship an affected version, including github.com/mattermost/mattermost-server/v5 and github.com/mattermost/mattermost-server. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-37860 in the wild and no public exploit code.","fix":"Upgrade github.com/mattermost/mattermost-server/v5 to 5.39.0 or later.","what":"CVE-2021-37860 is a low-severity cross-site scripting vulnerability in Mattermost Mattermost, published on 22 Sep 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-37860 and fix it if it is affected.\n\nWhat it is: CVE-2021-37860 is a low-severity cross-site scripting vulnerability in Mattermost Mattermost, published on 22 Sep 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-37860 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/mattermost/mattermost-server/v5 (Go): affected all versions; fixed in 5.39.0\n- github.com/mattermost/mattermost-server/v5 (Go): affected all versions; fixed in 5.39.0\n- github.com/mattermost/mattermost-server/v5 (Go): affected all versions; fixed in 5.39.0\n- github.com/mattermost/mattermost-server (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-2021-37860/ (Markdown: https://insights.sbomify.com/CVE-2021-37860/index.md)","id":"CVE-2021-37860","markdown":"https://insights.sbomify.com/CVE-2021-37860/index.md","name":"CVE-2021-37860","record":{"aliases":["GHSA-hv5f-73mr-7vvj","GO-2022-0604"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":true,"product_category":"Mattermost chat platform","requires_auth":"low_privilege","summary":"An attacker can inject arbitrary web script via unsanitized clipboard contents in Mattermost deployments with disabled Content Security Policy.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Mattermost","cpe":[{"product":"mattermost","vendor":"mattermost"}],"cvss":{"score":3.7,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Mattermost 5.38 and earlier fails to sufficiently sanitize clipboard contents, which allows a user-assisted attacker to inject arbitrary web script in product deployments that explicitly disable the default CSP.","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":"Cross-site Scripting in Mattermost","id":"CVE-2021-37860","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":"mattermost:mattermost","products":["mattermost:mattermost"],"type":"xss","year":"2021"},"n_packages":4,"n_references":1,"next":{"headline":"Information disclosure in Mattermost","id":"CVE-2021-37861"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server","purl":"pkg:golang/github.com/mattermost/mattermost-server","source":"GO-2022-0604"},{"ecosystem":"Go","fixed":["5.39.0"],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server/v5","purl":null,"source":"GHSA-hv5f-73mr-7vvj"},{"ecosystem":"Go","fixed":["5.39.0"],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server/v5","purl":"pkg:golang/github.com/mattermost/mattermost-server/v5","source":"GHSA-hv5f-73mr-7vvj"},{"ecosystem":"Go","fixed":["5.39.0"],"introduced":["0"],"last_affected":[],"package":"github.com/mattermost/mattermost-server/v5","purl":"pkg:golang/github.com/mattermost/mattermost-server/v5","source":"GO-2022-0604"}],"prev":{"headline":"Reflected XSS in OAuth Flow","id":"CVE-2021-37859"},"products":["Mattermost"],"published":"2021-09-22","related":[{"cvss_score":9.1,"headline":"Path traversal in n/a","id":"CVE-2019-20851","kev_date_added":null,"published":"2020-06-19"},{"cvss_score":8.7,"headline":"Malicious remote can add users to arbitrary teams and channels","id":"CVE-2024-39274","kev_date_added":null,"published":"2024-08-01"},{"cvss_score":8.7,"headline":"Malicious remote can invite itself to an arbitrary local channel","id":"CVE-2024-39777","kev_date_added":null,"published":"2024-08-01"},{"cvss_score":8.1,"headline":"Timing attack during remote cluster token comparison when shared channels are enabled","id":"CVE-2024-39830","kev_date_added":null,"published":"2024-07-03"},{"cvss_score":8.1,"headline":"Lack of server certificate validation in websockets connection","id":"CVE-2023-3615","kev_date_added":null,"published":"2023-07-17"},{"cvss_score":7.5,"headline":"Information disclosure in n/a","id":"CVE-2020-13891","kev_date_added":null,"published":"2020-06-26"},{"cvss_score":7.4,"headline":"Existing local user overwritten by malicious remote","id":"CVE-2024-36492","kev_date_added":null,"published":"2024-08-01"}],"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["Mattermost"]},"summary":"An attacker can inject arbitrary web script via unsanitized clipboard contents in Mattermost deployments with disabled Content Security Policy.","url":"https://insights.sbomify.com/CVE-2021-37860/"}