{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-39222 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-39222 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-39222 is a medium-severity cross-site scripting vulnerability in nextcloud security-advisories, published on 15 Nov 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-2021-39222 and fix it if it is affected.\n\nWhat it is: CVE-2021-39222 is a medium-severity cross-site scripting vulnerability in nextcloud security-advisories, published on 15 Nov 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-2021-39222 in the wild and no public exploit code.\n\nAffected product: nextcloud security-advisories. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2021-39222/ (Markdown: https://insights.sbomify.com/CVE-2021-39222/index.md)","id":"CVE-2021-39222","markdown":"https://insights.sbomify.com/CVE-2021-39222/index.md","name":"CVE-2021-39222","record":{"aliases":["GHSA-xhxq-f4vg-jw5g"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Nextcloud Talk","requires_auth":"low_privilege","summary":"Stored XSS in Nextcloud Talk allows code execution via malicious files, though mitigated by CSP on modern browsers.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"talk","vendor":"nextcloud"}],"cvss":{"score":6.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"},{"id":"CWE-434","name":"Unrestricted Upload of File with Dangerous Type"}],"description":"Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Talk application was vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. For exploitation, a user would need to right-click on a malicious file and open the file in a new tab. Due the strict Content-Security-Policy shipped with Nextcloud, this issue is not exploitable on modern browsers supporting Content-Security-Policy. It is recommended that the Nextcloud Talk application is upgraded to patched versions 10.0.7, 10.1.4, 11.1.2, 11.2.0 or 12.0.0. As a workaround, use a browser that has support for Content-Security-Policy.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"XSS in Talk","id":"CVE-2021-39222","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"File path disclosure of shared files in Richdocuments application","id":"CVE-2021-39223"},"packages":[],"prev":{"headline":"XSS in Contacts","id":"CVE-2021-39221"},"products":["security-advisories"],"published":"2021-11-15","related":[{"cvss_score":9.9,"headline":"Code injection in Nextcloud Talk","id":"CVE-2020-8180","kev_date_added":null,"published":"2020-06-08"},{"cvss_score":8.1,"headline":"Nextcloud Talk not properly disassociating users from chats after account deletion","id":"CVE-2021-32689","kev_date_added":null,"published":"2021-07-12"},{"cvss_score":7.2,"headline":"Path traversal allows tricking the Talk Android app into writing files into it's root directory","id":"CVE-2023-39957","kev_date_added":null,"published":"2023-08-10"},{"cvss_score":6.5,"headline":"Session Fixation in Nextcloud Talk","id":"CVE-2021-32676","kev_date_added":null,"published":"2021-06-16"},{"cvss_score":5.4,"headline":"Cross-site scripting in nextcloud/talk","id":"CVE-2018-3781","kev_date_added":null,"published":"2018-08-13"},{"cvss_score":4.7,"headline":"Geolocation preview links can be set to arbitrary links in nextcloud talk","id":"CVE-2021-41180","kev_date_added":null,"published":"2022-03-08"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":["nextcloud"]},"summary":"Stored XSS in Nextcloud Talk allows code execution via malicious files, though mitigated by CSP on modern browsers.","url":"https://insights.sbomify.com/CVE-2021-39222/"}