{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-3866 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-3866 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-3866 is a medium-severity cross-site scripting vulnerability in zulip/zulip, published on 20 Jan 2022. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-3866 and fix it if it is affected.\n\nWhat it is: CVE-2021-3866 is a medium-severity cross-site scripting vulnerability in zulip/zulip, published on 20 Jan 2022. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-3866 in the wild and no public exploit code.\n\nAffected product: zulip/zulip. 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-2021-3866/ (Markdown: https://insights.sbomify.com/CVE-2021-3866/index.md)","id":"CVE-2021-3866","markdown":"https://insights.sbomify.com/CVE-2021-3866/index.md","name":"CVE-2021-3866","record":{"aliases":["GHSA-c9g2-65fq-w8q5"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Zulip chat platform","requires_auth":"high_privilege","summary":"Stored XSS in Zulip allows attackers to inject malicious scripts, potentially leading to code execution or account takeover.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"@huntrdev","cpe":[{"product":"zulip","vendor":"zulip"}],"cvss":{"score":6.8,"severity":"medium","source":"cna","vector":"CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:L/A:L","version":"3.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Cross-site Scripting (XSS) - Stored in GitHub repository zulip/zulip more than and including 44f935695d452cc3fb16845a0c6af710438b153d and prior to 3eb2791c3e9695f7d37ffe84e0c2184fae665cb6.","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":"Cross-site Scripting (XSS) - Stored in zulip/zulip","id":"CVE-2021-3866","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"DO NOT USE THIS CANDIDATE NUMBER.","id":"CVE-2021-3867"},"packages":[],"prev":{"headline":"Privilege escalation in kernel","id":"CVE-2021-3864"},"products":["zulip/zulip"],"published":"2022-01-20","related":[{"cvss_score":8.6,"headline":"RabbitMQ exposes ports with weak default secrets in Zulip Server","id":"CVE-2021-43799","kev_date_added":null,"published":"2022-01-25"},{"cvss_score":8,"headline":"Crafted link in Zulip message can cause disclosure of credentials","id":"CVE-2022-35962","kev_date_added":null,"published":"2022-08-29"},{"cvss_score":7.5,"headline":"Auth bypass in zulip","id":"CVE-2016-4427","kev_date_added":null,"published":"2022-07-28"},{"cvss_score":6.5,"headline":"Unauthorized user can register an account in specific configurations in Zulip","id":"CVE-2023-28623","kev_date_added":null,"published":"2023-05-19"},{"cvss_score":6.5,"headline":"Ineffective expiration validation for invitation links in Zulip","id":"CVE-2021-43791","kev_date_added":null,"published":"2021-12-02"},{"cvss_score":6.1,"headline":"Zulip: Path Traversal in Import","id":"CVE-2026-26058","kev_date_added":null,"published":"2026-04-03"}],"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":"2024-08-03","vendors":["zulip"]},"summary":"Stored XSS in Zulip allows attackers to inject malicious scripts, potentially leading to code execution or account takeover.","url":"https://insights.sbomify.com/CVE-2021-3866/"}