{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-41836 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-41836 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-41836 is a medium-severity cross-site scripting vulnerability in Fathom Analytics, published on 14 Dec 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-41836 and fix it if it is affected.\n\nWhat it is: CVE-2021-41836 is a medium-severity cross-site scripting vulnerability in Fathom Analytics, published on 14 Dec 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-41836 in the wild and no public exploit code.\n\nAffected product: Fathom Analytics. 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-2021-41836/ (Markdown: https://insights.sbomify.com/CVE-2021-41836/index.md)","id":"CVE-2021-41836","markdown":"https://insights.sbomify.com/CVE-2021-41836/index.md","name":"CVE-2021-41836","record":{"aliases":["GHSA-4rfr-wr94-r2xv"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"WordPress plugin","requires_auth":"high_privilege","summary":"Administrators can inject arbitrary web scripts via the site_id parameter in Fathom Analytics, affecting multi-site installations with specific HTML filtering settings.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Wordfence","cpe":[{"product":"fathom_analytics","vendor":"conva"}],"cvss":{"score":4.8,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/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":"The Fathom Analytics WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and escaping via the $site_id parameter found in the ~/fathom-analytics.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 3.0.4. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.","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":"Fathom Analytics \u003c= 3.0.4 Authenticated Stored Cross-Site Scripting","id":"CVE-2021-41836","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Memory corruption in n/a","id":"CVE-2021-41837"},"packages":[],"prev":{"headline":"Fresenius Kabi Agilia Connect Infusion System use of a broken or risky cryptographic algorithm","id":"CVE-2021-41835"},"products":["Fathom Analytics"],"published":"2021-12-14","related":[],"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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-02-10","vendors":["Fathom Analytics"]},"summary":"Administrators can inject arbitrary web scripts via the site_id parameter in Fathom Analytics, affecting multi-site installations with specific HTML filtering settings.","url":"https://insights.sbomify.com/CVE-2021-41836/"}