{"answers":{"affected":"2 open source packages ship an affected version, including koa-remove-trailing-slashes. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-23384 in the wild and no public exploit code.","fix":"Upgrade koa-remove-trailing-slashes to 2.0.2 or later.","what":"CVE-2021-23384 is a medium-severity vulnerability in koa-remove-trailing-slashes, published on 17 May 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-2021-23384 and fix it if it is affected.\n\nWhat it is: CVE-2021-23384 is a medium-severity vulnerability in koa-remove-trailing-slashes, published on 17 May 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-2021-23384 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- koa-remove-trailing-slashes (npm): affected all versions; fixed in 2.0.2\n- koa-remove-trailing-slashes (npm): affected all versions; fixed in 2.0.2\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-2021-23384/ (Markdown: https://insights.sbomify.com/CVE-2021-23384/index.md)","id":"CVE-2021-23384","markdown":"https://insights.sbomify.com/CVE-2021-23384/index.md","name":"CVE-2021-23384","record":{"aliases":["GHSA-r773-pmw3-f4mr"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Koa middleware library","requires_auth":"none","summary":"An attacker can redirect users to malicious sites via crafted URLs with double slashes in the koa-remove-trailing-slashes middleware.","user_interaction":"required","vuln_class":"open_redirect"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"snyk","cpe":[{"product":"koa-remove-trailing-slashes","vendor":"koa-remove-trailing-slashes_project"}],"cvss":{"score":5.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-601","name":"URL Redirection to Untrusted Site"}],"description":"The package koa-remove-trailing-slashes before 2.0.2 are vulnerable to Open Redirect via the use of trailing double slashes in the URL when accessing the vulnerable endpoint (such as https://example.com//attacker.example/). The vulnerable code is in index.js::removeTrailingSlashes(), as the web server uses relative URLs instead of absolute URLs.","ecosystems":["npm"],"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","id":"CVE-2021-23384","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"open_redirect","year":"2021"},"n_packages":2,"n_references":2,"next":{"headline":"Open Redirect","id":"CVE-2021-23385"},"packages":[{"ecosystem":"npm","fixed":["2.0.2"],"introduced":["0"],"last_affected":[],"package":"koa-remove-trailing-slashes","purl":null,"source":"GHSA-r773-pmw3-f4mr"},{"ecosystem":"npm","fixed":["2.0.2"],"introduced":["0"],"last_affected":[],"package":"koa-remove-trailing-slashes","purl":"pkg:npm/koa-remove-trailing-slashes","source":"GHSA-r773-pmw3-f4mr"}],"prev":{"headline":"Prototype Pollution","id":"CVE-2021-23383"},"products":["koa-remove-trailing-slashes"],"published":"2021-05-17","related":[],"sources":[{"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":"2024-09-16","vendors":["n/a"]},"summary":"An attacker can redirect users to malicious sites via crafted URLs with double slashes in the koa-remove-trailing-slashes middleware.","url":"https://insights.sbomify.com/CVE-2021-23384/"}