{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47733 exists.","fix":"No fix has been published for CVE-2021-47733 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-47733 is a medium-severity cross-site scripting vulnerability in CMSimple, published on 23 Dec 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-47733 and fix it if it is affected.\n\nWhat it is: CVE-2021-47733 is a medium-severity cross-site scripting vulnerability in CMSimple, published on 23 Dec 2025. Any signed-in user can exploit it over the network, 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-2021-47733 exists.\n\nAffected product: CMSimple. 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-2021-47733/ (Markdown: https://insights.sbomify.com/CVE-2021-47733/index.md)","id":"CVE-2021-47733","markdown":"https://insights.sbomify.com/CVE-2021-47733/index.md","name":"CVE-2021-47733","record":{"aliases":["GHSA-m47r-hm3g-h92f"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"CMSimple CMS","requires_auth":"low_privilege","summary":"Attackers can execute arbitrary JavaScript in victims' browsers by bypassing input filters using HTML Unicode encoding in CMSimple.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"cmsimple","vendor":"cmsimple"}],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"CMSimple 5.4 contains a cross-site scripting vulnerability that allows attackers to bypass input filtering by using HTML to Unicode encoding. Attackers can inject malicious scripts by encoding payloads like ')-alert(1)// and execute arbitrary JavaScript when victims interact with delete buttons.","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":"CMSimple 5.4 Cross-Site Scripting via HTML Unicode Encoding","id":"CVE-2021-47733","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"CMSimple 5.4 Authenticated Local File Inclusion Remote Code Execution","id":"CVE-2021-47734"},"packages":[],"prev":{"headline":"CMSimple 5.2 Stored Cross-Site Scripting via Filebrowser External Input","id":"CVE-2021-47732"},"products":["CMSimple"],"published":"2025-12-23","related":[{"cvss_score":9.8,"headline":"Path traversal in n/a","id":"CVE-2021-43741","kev_date_added":null,"published":"2022-04-13"},{"cvss_score":9.1,"headline":"Missing authorization in n/a","id":"CVE-2024-57548","kev_date_added":null,"published":"2025-01-27"},{"cvss_score":8.6,"headline":"CMSimple 5.4 Authenticated Local File Inclusion Remote Code Execution","id":"CVE-2021-47734","kev_date_added":null,"published":"2025-12-23"},{"cvss_score":8.6,"headline":"CMSimple 5.4 Authenticated Remote Code Execution via Template Editing","id":"CVE-2021-47735","kev_date_added":null,"published":"2025-12-23"},{"cvss_score":8.6,"headline":"CMSimple 5.15 Remote Command Execution via Extensions Configuration","id":"CVE-2024-58280","kev_date_added":null,"published":"2025-12-10"},{"cvss_score":7.5,"headline":"Information disclosure in n/a","id":"CVE-2024-57546","kev_date_added":null,"published":"2025-01-27"},{"cvss_score":7.5,"headline":"Information disclosure in n/a","id":"CVE-2024-57547","kev_date_added":null,"published":"2025-01-27"}],"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":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-07","vendors":["Cmsimple"]},"summary":"Attackers can execute arbitrary JavaScript in victims' browsers by bypassing input filters using HTML Unicode encoding in CMSimple.","url":"https://insights.sbomify.com/CVE-2021-47733/"}