{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-40542 exists.","fix":"No fix has been published for CVE-2021-40542 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-40542 is a medium-severity cross-site scripting vulnerability in Os4ed Opensis, published on 11 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-2021-40542 and fix it if it is affected.\n\nWhat it is: CVE-2021-40542 is a medium-severity cross-site scripting vulnerability in Os4ed Opensis, published on 11 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-40542 exists.\n\nAffected product: Os4ed Opensis. 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-2021-40542/ (Markdown: https://insights.sbomify.com/CVE-2021-40542/index.md)","id":"CVE-2021-40542","markdown":"https://insights.sbomify.com/CVE-2021-40542/index.md","name":"CVE-2021-40542","record":{"aliases":["GHSA-88f6-r22m-fxmf"],"analysis":{"component_type":"web_application","fix_type":"no_fix_stated","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Opensis-Classic","requires_auth":"none","summary":"An unauthenticated attacker can inject and execute JavaScript code via the link_url parameter in Ajax_url_encode.php.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"opensis","vendor":"os4ed"}],"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":"Opensis-Classic Version 8.0 is affected by cross-site scripting (XSS). An unauthenticated user can inject and execute JavaScript code through the link_url parameter in Ajax_url_encode.php.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":1,"refs":[{"date":null,"kind":"nuclei","ref":"http/cves/2021/CVE-2021-40542.yaml","stars":null,"title":"Opensis-Classic 8.0 - Cross-Site Scripting"}],"tier":"weaponised"},"has_fix":false,"headline":"Cross-site scripting in n/a","id":"CVE-2021-40542","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"os4ed:opensis","products":["os4ed:opensis"],"type":"xss","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"SQL injection in n/a","id":"CVE-2021-40543"},"packages":[],"prev":{"headline":"Cross-site scripting in n/a","id":"CVE-2021-40541"},"products":["n/a"],"published":"2021-10-11","related":[{"cvss_score":10,"headline":"Code injection in OS4Ed","id":"CVE-2020-6143","kev_date_added":null,"published":"2020-09-01"},{"cvss_score":10,"headline":"Code injection in OS4Ed","id":"CVE-2020-6144","kev_date_added":null,"published":"2020-09-01"},{"cvss_score":9.9,"headline":"Path traversal in OS4Ed","id":"CVE-2020-6142","kev_date_added":null,"published":"2020-09-01"},{"cvss_score":9.8,"headline":"SQL injection in n/a","id":"CVE-2021-41691","kev_date_added":null,"published":"2025-06-24"},{"cvss_score":9.8,"headline":"Path traversal in n/a","id":"CVE-2025-22926","kev_date_added":null,"published":"2025-04-03"},{"cvss_score":9.8,"headline":"SQL injection in n/a","id":"CVE-2025-22928","kev_date_added":null,"published":"2025-04-03"},{"cvss_score":9.8,"headline":"SQL injection in n/a","id":"CVE-2025-22929","kev_date_added":null,"published":"2025-04-03"}],"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)"},{"class":"attribution","licence":"MIT","name":"Nuclei templates"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"An unauthenticated attacker can inject and execute JavaScript code via the link_url parameter in Ajax_url_encode.php.","url":"https://insights.sbomify.com/CVE-2021-40542/"}