{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-21802 exists.","fix":"No fix has been published for CVE-2021-21802 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21802 is a critical cross-site scripting vulnerability in Advantech, published on 16 Jul 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-2021-21802 and fix it if it is affected.\n\nWhat it is: CVE-2021-21802 is a critical cross-site scripting vulnerability in Advantech, published on 16 Jul 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-2021-21802 exists.\n\nAffected product: Advantech. 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-2021-21802/ (Markdown: https://insights.sbomify.com/CVE-2021-21802/index.md)","id":"CVE-2021-21802","markdown":"https://insights.sbomify.com/CVE-2021-21802/index.md","name":"CVE-2021-21802","record":{"aliases":["GHSA-xwr5-mcxm-cm87"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Advantech R-SeeNet","requires_auth":"none","summary":"Attackers can execute arbitrary JavaScript in victims' browsers via crafted URLs in Advantech R-SeeNet, potentially leading to session hijacking or malicious actions.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"talos","cpe":[{"product":"r-seenet","vendor":"advantech"}],"cvss":{"score":9.6,"severity":"critical","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"This vulnerability is present in device_graph_page.php script, which is a part of the Advantech R-SeeNet web applications. A specially crafted URL by an attacker and visited by a victim can lead to arbitrary JavaScript code execution.","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-2021-21802.yaml","stars":null,"title":"Advantech R-SeeNet - Cross-Site Scripting"}],"tier":"weaponised"},"has_fix":null,"headline":"Cross-site scripting in Advantech","id":"CVE-2021-21802","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Cross-site scripting in Advantech","id":"CVE-2021-21803"},"packages":[],"prev":{"headline":"Cross-site scripting in Advantech","id":"CVE-2021-21801"},"products":["Advantech"],"published":"2021-07-16","related":[{"cvss_score":9.8,"headline":"Advantech R-SeeNet Unauthenticated Read/Write","id":"CVE-2023-5642","kev_date_added":null,"published":"2023-10-18"},{"cvss_score":9.8,"headline":"Advantech R-SeeNet Use of Hard-coded Credentials","id":"CVE-2023-2611","kev_date_added":null,"published":"2023-06-22"},{"cvss_score":9.8,"headline":"Memory corruption in R-SeeNet","id":"CVE-2022-3385","kev_date_added":null,"published":"2022-10-27"},{"cvss_score":9.8,"headline":"Memory corruption in R-SeeNet","id":"CVE-2022-3386","kev_date_added":null,"published":"2022-10-27"},{"cvss_score":9.8,"headline":"Command injection in Advantech","id":"CVE-2021-21805","kev_date_added":null,"published":"2021-08-05"},{"cvss_score":9.6,"headline":"Cross-site scripting in Advantech","id":"CVE-2021-21799","kev_date_added":null,"published":"2021-07-16"},{"cvss_score":9.6,"headline":"Cross-site scripting in Advantech","id":"CVE-2021-21800","kev_date_added":null,"published":"2021-07-16"}],"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":"2024-08-03","vendors":["n/a"]},"summary":"Attackers can execute arbitrary JavaScript in victims' browsers via crafted URLs in Advantech R-SeeNet, potentially leading to session hijacking or malicious actions.","url":"https://insights.sbomify.com/CVE-2021-21802/"}