{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47899 exists.","fix":"No fix has been published for CVE-2021-47899 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-47899 is a medium-severity server-side request forgery vulnerability in Mfscripts YetiShare File Hosting Script, published on 23 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-2021-47899 and fix it if it is affected.\n\nWhat it is: CVE-2021-47899 is a medium-severity server-side request forgery vulnerability in Mfscripts YetiShare File Hosting Script, published on 23 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-2021-47899 exists.\n\nAffected product: Mfscripts YetiShare File Hosting Script. 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-2021-47899/ (Markdown: https://insights.sbomify.com/CVE-2021-47899/index.md)","id":"CVE-2021-47899","markdown":"https://insights.sbomify.com/CVE-2021-47899/index.md","name":"CVE-2021-47899","record":{"aliases":["GHSA-38wv-wfx6-3cx2"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"File hosting script","requires_auth":"none","summary":"Attackers can exploit a Server-Side Request Forgery vulnerability in the remote file upload feature to read sensitive local system files.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L","version":"4.0"},"cwes":[{"id":"CWE-434","name":"Unrestricted Upload of File with Dangerous Type"}],"description":"YetiShare File Hosting Script 5.1.0 contains a server-side request forgery vulnerability that allows attackers to read local system files through the remote file upload feature. Attackers can exploit the url parameter in the url_upload_handler endpoint to access sensitive files like /etc/passwd by using file:/// protocol.","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":"YetiShare File Hosting Script 5.1.0 Remote File Upload SSRF Vulnerability","id":"CVE-2021-47899","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"ssrf","year":"2021"},"n_packages":0,"n_references":4,"next":{"headline":"Gila CMS \u003c 2.0.0 - Remote Code Execution","id":"CVE-2021-47900"},"packages":[],"prev":{"headline":"Epson USB Display 1.6.0.0 Unquoted Service Path Vulnerability","id":"CVE-2021-47898"},"products":["YetiShare File Hosting Script"],"published":"2026-01-23","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-10-01","vendors":["Mfscripts"]},"summary":"Attackers can exploit a Server-Side Request Forgery vulnerability in the remote file upload feature to read sensitive local system files.","url":"https://insights.sbomify.com/CVE-2021-47899/"}