{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-22920 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-22920 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-22920 is a medium-severity authentication bypass vulnerability in Citrix ADC, Citrix Gateway, published on 5 Aug 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-22920 and fix it if it is affected.\n\nWhat it is: CVE-2021-22920 is a medium-severity authentication bypass vulnerability in Citrix ADC, Citrix Gateway, published on 5 Aug 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-22920 in the wild and no public exploit code.\n\nAffected product: Citrix ADC, Citrix Gateway. 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-2021-22920/ (Markdown: https://insights.sbomify.com/CVE-2021-22920/index.md)","id":"CVE-2021-22920","markdown":"https://insights.sbomify.com/CVE-2021-22920/index.md","name":"CVE-2021-22920","record":{"aliases":["GHSA-5w66-9x5w-m57v"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["account_takeover","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Citrix ADC Gateway","requires_auth":"none","summary":"Attackers can hijack SAML authentication to steal valid user sessions, leading to account takeover on Citrix ADC and Gateway devices.","user_interaction":"required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"hackerone","cpe":[{"product":"application_delivery_management","vendor":"citrix"},{"product":"gateway","vendor":"citrix"}],"cvss":{"score":6.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-284","name":"Improper Access Control"}],"description":"A vulnerability has been discovered in Citrix ADC (formerly known as NetScaler ADC) and Citrix Gateway (formerly known as NetScaler Gateway), and Citrix SD-WAN WANOP Edition models 4000-WO, 4100-WO, 5000-WO, and 5100-WO. These vulnerabilities, if exploited, could lead to a phishing attack through a SAML authentication hijack to steal a valid user session.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Auth bypass in Citrix ADC, Citrix Gateway","id":"CVE-2021-22920","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Incorrect Permission Assignment for Critical Resource in Node","id":"CVE-2021-22921"},"packages":[],"prev":{"headline":"Denial of service in Citrix ADC, Citrix Gateway, Citrix SD-WAN WANOP","id":"CVE-2021-22919"},"products":["Citrix ADC, Citrix Gateway"],"published":"2021-08-05","related":[{"cvss_score":10,"headline":"Missing authorization in n/a","id":"CVE-2019-9548","kev_date_added":null,"published":"2019-06-05"},{"cvss_score":8.8,"headline":"Missing authorization in n/a","id":"CVE-2019-17366","kev_date_added":null,"published":"2019-10-09"},{"cvss_score":8.1,"headline":"Privilege escalation in Citrix Application Delivery Management (Citrix ADM)","id":"CVE-2022-27511","kev_date_added":null,"published":"2022-06-16"},{"cvss_score":5.3,"headline":"Temporary disruption of the ADM license service","id":"CVE-2022-27512","kev_date_added":null,"published":"2022-06-16"}],"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":["n/a"]},"summary":"Attackers can hijack SAML authentication to steal valid user sessions, leading to account takeover on Citrix ADC and Gateway devices.","url":"https://insights.sbomify.com/CVE-2021-22920/"}