{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2016-4427 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2016-4427 yet. Limit exposure of the affected software until one is available.","what":"CVE-2016-4427 is a high-severity authentication bypass vulnerability in zulip, published on 28 Jul 2022. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2016-4427 and fix it if it is affected.\n\nWhat it is: CVE-2016-4427 is a high-severity authentication bypass vulnerability in zulip, published on 28 Jul 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2016-4427 in the wild and no public exploit code.\n\nAffected product: 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-2016-4427/ (Markdown: https://insights.sbomify.com/CVE-2016-4427/index.md)","id":"CVE-2016-4427","markdown":"https://insights.sbomify.com/CVE-2016-4427/index.md","name":"CVE-2016-4427","record":{"aliases":["GHSA-58ww-8hxm-f99f"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":true,"product_category":"Zulip chat platform","requires_auth":"none","summary":"Deactivated users can access messages in Zulip when Single Sign-On is enabled, allowing unauthorized data disclosure.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"zulip","vendor":"zulip"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-284","name":"Improper Access Control"}],"description":"In zulip before 1.3.12, deactivated users could access messages if SSO was enabled.","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":"Auth bypass in zulip","id":"CVE-2016-4427","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2016"},"n_packages":0,"n_references":1,"next":{"headline":"OpenStack Dashboard (Horizon) Cross-site scripting (XSS) vulnerability","id":"CVE-2016-4428"},"packages":[],"prev":{"headline":"Information disclosure in zulip","id":"CVE-2016-4426"},"products":["zulip"],"published":"2022-07-28","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":6.8,"headline":"Cross-site Scripting (XSS) - Stored in zulip/zulip","id":"CVE-2021-3866","kev_date_added":null,"published":"2022-01-20"},{"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":"2024-08-06","vendors":["n/a"]},"summary":"Deactivated users can access messages in Zulip when Single Sign-On is enabled, allowing unauthorized data disclosure.","url":"https://insights.sbomify.com/CVE-2016-4427/"}