{"answers":{"affected":"3 open source packages ship an affected version, including github.com/oauth2-proxy/oauth2-proxy and oauth2-proxy. It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-5233 in the wild and no public exploit code.","fix":"Upgrade github.com/oauth2-proxy/oauth2-proxy to 5.0.0 or later.","what":"CVE-2020-5233 is a medium-severity vulnerability in pusher OAuth2 Proxy, published on 30 Jan 2020. 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-2020-5233 and fix it if it is affected.\n\nWhat it is: CVE-2020-5233 is a medium-severity vulnerability in pusher OAuth2 Proxy, published on 30 Jan 2020. 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-2020-5233 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/oauth2-proxy/oauth2-proxy (Go): affected all versions; fixed in 5.0.0\n- github.com/oauth2-proxy/oauth2-proxy (Go): affected all versions; fixed in 5.0.0\n- oauth2-proxy (Bitnami): affected all versions; fixed in 5.0.0\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-2020-5233/ (Markdown: https://insights.sbomify.com/CVE-2020-5233/index.md)","id":"CVE-2020-5233","markdown":"https://insights.sbomify.com/CVE-2020-5233/index.md","name":"CVE-2020-5233","record":{"aliases":["BIT-oauth2-proxy-2020-5233","GHSA-qqxw-m5fj-f7gv"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["account_takeover","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"OAuth2 Proxy","requires_auth":"low_privilege","summary":"Attackers can exploit an open redirect in OAuth2 Proxy to silently harvest authentication tokens, potentially leading to account takeover.","user_interaction":"required","vuln_class":"open_redirect"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"oauth2_proxy","vendor":"oauth2_proxy_project"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-601","name":"URL Redirection to Untrusted Site"}],"description":"OAuth2 Proxy before 5.0 has an open redirect vulnerability. Authentication tokens could be silently harvested by an attacker. This has been patched in version 5.0.","ecosystems":["Bitnami","Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Open Redirect in OAuth2 Proxy","id":"CVE-2020-5233","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"open_redirect","year":"2020"},"n_packages":3,"n_references":3,"next":{"headline":"Untrusted data can lead to DoS attack in MessagePack for C# and Unity","id":"CVE-2020-5234"},"packages":[{"ecosystem":"Bitnami","fixed":["5.0.0"],"introduced":["0"],"last_affected":[],"package":"oauth2-proxy","purl":"pkg:bitnami/oauth2-proxy","source":"BIT-oauth2-proxy-2020-5233"},{"ecosystem":"Go","fixed":["5.0.0"],"introduced":["0"],"last_affected":[],"package":"github.com/oauth2-proxy/oauth2-proxy","purl":null,"source":"GHSA-qqxw-m5fj-f7gv"},{"ecosystem":"Go","fixed":["5.0.0"],"introduced":["0"],"last_affected":[],"package":"github.com/oauth2-proxy/oauth2-proxy","purl":"pkg:golang/github.com/oauth2-proxy/oauth2-proxy","source":"GHSA-qqxw-m5fj-f7gv"}],"prev":{"headline":"Ethereum Name Service - Malicious takeover of previously owned ENS names","id":"CVE-2020-5232"},"products":["OAuth2 Proxy"],"published":"2020-01-30","related":[{"cvss_score":9.1,"headline":"OAuth2 Proxy has an Authentication Bypass via X-Forwarded-Uri Header Spoofing","id":"CVE-2026-40575","kev_date_added":null,"published":"2026-04-21"},{"cvss_score":9.1,"headline":"OAuth2 Proxy: Health Check User-Agent Matching Bypasses Authentication in auth_request Mode","id":"CVE-2026-34457","kev_date_added":null,"published":"2026-04-14"},{"cvss_score":9.1,"headline":"OAuth2-Proxy has authentication bypass in oauth2-proxy skip_auth_routes due to Query Parameter inclusion","id":"CVE-2025-54576","kev_date_added":null,"published":"2025-07-30"},{"cvss_score":8.8,"headline":"Cross-site Request Forgery (CSRF)","id":"CVE-2017-1000069","kev_date_added":null,"published":"2017-07-13"},{"cvss_score":8.2,"headline":"OAuth2 Proxy has an Authentication Bypass via Fragment Confusion in skip_auth_routes and skip_auth_regex","id":"CVE-2026-41059","kev_date_added":null,"published":"2026-04-21"},{"cvss_score":7.1,"headline":"Open Redirect in OAuth2 Proxy","id":"CVE-2020-11053","kev_date_added":null,"published":"2020-05-07"},{"cvss_score":6.8,"headline":"OAuth2 Proxy has an Authorization Bypass in Email Domain Validation via Malformed Multi-@ Email Claims","id":"CVE-2026-40574","kev_date_added":null,"published":"2026-04-21"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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":["pusher"]},"summary":"Attackers can exploit an open redirect in OAuth2 Proxy to silently harvest authentication tokens, potentially leading to account takeover.","url":"https://insights.sbomify.com/CVE-2020-5233/"}