{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2017-0881 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2017-0881 yet. Limit exposure of the affected software until one is available.","what":"CVE-2017-0881 is a medium-severity missing authorization vulnerability in Zulip Server Versions 1.4.2 and below, published on 28 Mar 2017. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2017-0881 and fix it if it is affected.\n\nWhat it is: CVE-2017-0881 is a medium-severity missing authorization vulnerability in Zulip Server Versions 1.4.2 and below, published on 28 Mar 2017. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2017-0881 in the wild and no public exploit code.\n\nAffected product: Zulip Server Versions 1.4.2 and below. 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-2017-0881/ (Markdown: https://insights.sbomify.com/CVE-2017-0881/index.md)","id":"CVE-2017-0881","markdown":"https://insights.sbomify.com/CVE-2017-0881/index.md","name":"CVE-2017-0881","record":{"aliases":["GHSA-435h-5vch-xh86"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Zulip chat server","requires_auth":"low_privilege","summary":"Authenticated users can bypass invitation requirements to subscribe to private streams, exposing private data.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"hackerone","cpe":[{"product":"zulip_server","vendor":"zulip"}],"cvss":{"score":4.3,"severity":"medium","source":"nvd","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.0"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"},{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"An error in the implementation of an autosubscribe feature in the check_stream_exists route of the Zulip group chat application server before 1.4.3 allowed an authenticated user to subscribe to a private stream that should have required an invitation from an existing member to join. The issue affects all previously released versions of the Zulip server.","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":"Missing authorization in Zulip Server Versions 1.4.2 and below","id":"CVE-2017-0881","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2017"},"n_packages":0,"n_references":3,"next":{"headline":"Information disclosure in GitLab Community Edition and GitLab Enterprise Edition 8.7.0 through 8.15.7, 8.16.0 through 8.16.7, 8.17.0 through 8.17.3","id":"CVE-2017-0882"},"packages":[],"prev":{"headline":"Denial of service in Android","id":"CVE-2017-0880"},"products":["Zulip Server Versions 1.4.2 and below"],"published":"2017-03-28","related":[{"cvss_score":9.8,"headline":"Information disclosure in n/a","id":"CVE-2019-18933","kev_date_added":null,"published":"2019-11-21"},{"cvss_score":8.8,"headline":"Code injection in n/a","id":"CVE-2020-15070","kev_date_added":null,"published":"2020-08-21"},{"cvss_score":8.8,"headline":"Missing authorization in Zulip Server","id":"CVE-2017-0910","kev_date_added":null,"published":"2017-11-27"},{"cvss_score":8.2,"headline":"Zulip Authentication Backend Configuration Bypass","id":"CVE-2025-31478","kev_date_added":null,"published":"2025-04-16"},{"cvss_score":8.2,"headline":"Cross-site scripting vulnerability in Zulip Server development branch via topic tooltip","id":"CVE-2023-33186","kev_date_added":null,"published":"2023-05-30"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2024-36612","kev_date_added":null,"published":"2024-11-29"},{"cvss_score":7.5,"headline":"Privilege escalation in n/a","id":"CVE-2020-14215","kev_date_added":null,"published":"2020-08-21"}],"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":"2024-08-05","vendors":["n/a"]},"summary":"Authenticated users can bypass invitation requirements to subscribe to private streams, exposing private data.","url":"https://insights.sbomify.com/CVE-2017-0881/"}