{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-27340 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-27340 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-27340 is a medium-severity cross-site scripting vulnerability in Os4ed Opensis, published on 16 Sep 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-2021-27340 and fix it if it is affected.\n\nWhat it is: CVE-2021-27340 is a medium-severity cross-site scripting vulnerability in Os4ed Opensis, published on 16 Sep 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-2021-27340 in the wild and no public exploit code.\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-2021-27340/ (Markdown: https://insights.sbomify.com/CVE-2021-27340/index.md)","id":"CVE-2021-27340","markdown":"https://insights.sbomify.com/CVE-2021-27340/index.md","name":"CVE-2021-27340","record":{"aliases":["GHSA-6ph7-3cx8-q7xh"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"OpenSIS Community Edition","requires_auth":"none","summary":"Reflected XSS in OpenSIS allows attackers to execute arbitrary scripts via the opt parameter, potentially leading to session hijacking or data theft.","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 Community Edition version \u003c= 7.6 is affected by a reflected XSS vulnerability in EmailCheck.php via the \"opt\" parameter.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Cross-site scripting in n/a","id":"CVE-2021-27340","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"os4ed:opensis","products":["os4ed:opensis"],"type":"xss","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"Path traversal in n/a","id":"CVE-2021-27341"},"packages":[],"prev":{"headline":"Cross-site scripting in n/a","id":"CVE-2021-27338"},"products":["n/a"],"published":"2021-09-16","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)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"Reflected XSS in OpenSIS allows attackers to execute arbitrary scripts via the opt parameter, potentially leading to session hijacking or data theft.","url":"https://insights.sbomify.com/CVE-2021-27340/"}