{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47755 exists.","fix":"No fix has been published for CVE-2021-47755 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-47755 is a high-severity path traversal vulnerability in Softlink Education Oliver Library Server, published on 15 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-47755 and fix it if it is affected.\n\nWhat it is: CVE-2021-47755 is a high-severity path traversal vulnerability in Softlink Education Oliver Library Server, published on 15 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47755 exists.\n\nAffected product: Softlink Education Oliver Library Server. 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-2021-47755/ (Markdown: https://insights.sbomify.com/CVE-2021-47755/index.md)","id":"CVE-2021-47755","markdown":"https://insights.sbomify.com/CVE-2021-47755/index.md","name":"CVE-2021-47755","record":{"aliases":["GHSA-c22c-g99c-vw87"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Library management system","requires_auth":"none","summary":"Unauthenticated attackers can download arbitrary system files from Oliver Library Server v5 by manipulating the fileName parameter in the FileServlet endpoint.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"oliver_v5_library","vendor":"softlinkint"}],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"Oliver Library Server v5 contains a file download vulnerability that allows unauthenticated attackers to access arbitrary system files through unsanitized input in the FileServlet endpoint. Attackers can exploit the vulnerability by manipulating the 'fileName' parameter to download sensitive files from the server's filesystem.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"Oliver Library Server v5 - Arbitrary File Download","id":"CVE-2021-47755","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Laravel Valet 2.0.3 - Local Privilege Escalation (macOS)","id":"CVE-2021-47756"},"packages":[],"prev":{"headline":"Arunna 1.0.0 - 'Multiple' Cross-Site Request Forgery (CSRF)","id":"CVE-2021-47754"},"products":["Oliver Library Server"],"published":"2026-01-15","related":[{"cvss_score":7.5,"headline":"Path traversal in n/a","id":"CVE-2021-45027","kev_date_added":null,"published":"2022-09-01"}],"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":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-07","vendors":["Softlink Education"]},"summary":"Unauthenticated attackers can download arbitrary system files from Oliver Library Server v5 by manipulating the fileName parameter in the FileServlet endpoint.","url":"https://insights.sbomify.com/CVE-2021-47755/"}