{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-21494 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-21494 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-21494 is a medium-severity cross-site scripting vulnerability in n/a, published on 4 Oct 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-2020-21494 and fix it if it is affected.\n\nWhat it is: CVE-2020-21494 is a medium-severity cross-site scripting vulnerability in n/a, published on 4 Oct 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-2020-21494 in the wild and no public exploit code.\n\nAffected product: n/a. 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-2020-21494/ (Markdown: https://insights.sbomify.com/CVE-2020-21494/index.md)","id":"CVE-2020-21494","markdown":"https://insights.sbomify.com/CVE-2020-21494/index.md","name":"CVE-2020-21494","record":{"aliases":["GHSA-hvwx-c823-vgxp"],"analysis":{"component_type":"web_application","fix_type":"no_fix_stated","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Xiuno BBS forum","requires_auth":"none","summary":"Attackers can execute arbitrary web scripts or HTML in Xiuno BBS by manipulating the doctype value in the installation SQL component.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"xiunobbs","vendor":"xiuno"}],"cvss":{"score":6.1,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"A cross-site scripting (XSS) vulnerability in the component install\\install.sql of Xiuno BBS 4.0.4 allows attackers to execute arbitrary web scripts or HTML via changing the doctype value to 0.","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":"Cross-site scripting in n/a","id":"CVE-2020-21494","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2020"},"n_packages":0,"n_references":2,"next":{"headline":"Cross-site scripting in n/a","id":"CVE-2020-21495"},"packages":[],"prev":{"headline":"Information disclosure in n/a","id":"CVE-2020-21493"},"products":["n/a"],"published":"2021-10-04","related":[{"cvss_score":7.5,"headline":"XML external entity in n/a","id":"CVE-2019-19998","kev_date_added":null,"published":"2019-12-26"},{"cvss_score":6.1,"headline":"Cross-site scripting in n/a","id":"CVE-2020-19914","kev_date_added":null,"published":"2022-09-07"},{"cvss_score":6.1,"headline":"Cross-site scripting in n/a","id":"CVE-2020-21495","kev_date_added":null,"published":"2021-10-04"},{"cvss_score":6.1,"headline":"Cross-site scripting in n/a","id":"CVE-2020-21496","kev_date_added":null,"published":"2021-10-04"},{"cvss_score":6.1,"headline":"Cross-site scripting in n/a","id":"CVE-2018-15559","kev_date_added":null,"published":"2018-08-20"},{"cvss_score":5.3,"headline":"Information disclosure in n/a","id":"CVE-2020-21493","kev_date_added":null,"published":"2021-10-04"}],"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":"2024-08-04","vendors":["n/a"]},"summary":"Attackers can execute arbitrary web scripts or HTML in Xiuno BBS by manipulating the doctype value in the installation SQL component.","url":"https://insights.sbomify.com/CVE-2020-21494/"}