{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-66521 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2025-66521 yet. Limit exposure of the affected software until one is available.","what":"CVE-2025-66521 is a medium-severity cross-site scripting vulnerability in pdfonline.foxit.com, published on 19 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-2025-66521 and fix it if it is affected.\n\nWhat it is: CVE-2025-66521 is a medium-severity cross-site scripting vulnerability in pdfonline.foxit.com, published on 19 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: There is no known exploitation of CVE-2025-66521 in the wild and no public exploit code.\n\nAffected product: pdfonline.foxit.com. 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-2025-66521/ (Markdown: https://insights.sbomify.com/CVE-2025-66521/index.md)","id":"CVE-2025-66521","markdown":"https://insights.sbomify.com/CVE-2025-66521/index.md","name":"CVE-2025-66521","record":{"aliases":["GHSA-8wr8-qf33-p6vc"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Foxit PDF Online","requires_auth":"low_privilege","summary":"Attackers can inject malicious scripts via certificate names in Foxit PDF Online, leading to script execution when the Trusted Certificates view is loaded.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Foxit","cpe":[{"product":"pdf_editor_cloud","vendor":"foxit"}],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"A stored cross-site scripting (XSS) vulnerability exists in pdfonline.foxit.com within the Trusted Certificates feature. A crafted payload can be injected as the certificate name, which is later rendered into the DOM without proper sanitization. As a result, the injected script executes each time the Trusted Certificates view is loaded.","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":"Foxit pdfonline.foxit.com Stored Cross-Site Scripting in Trusted Certificates Feature","id":"CVE-2025-66521","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2025"},"n_packages":0,"n_references":1,"next":{"headline":"Foxit pdfonline.foxit.com Stored Cross-Site Scripting in Digital IDs Common Name Field","id":"CVE-2025-66522"},"packages":[],"prev":{"headline":"Foxit pdfonline.foxit.com Stored Cross-Site Scripting in Portfolio SVG Handling","id":"CVE-2025-66520"},"products":["pdfonline.foxit.com"],"published":"2025-12-19","related":[{"cvss_score":6.3,"headline":"Stored XSS via Attachments Feature in https://pdfonline.foxit.com/","id":"CVE-2026-1591","kev_date_added":null,"published":"2026-02-03"},{"cvss_score":6.3,"headline":"Stored XSS via Create New Layer Field found in Foxit PDF Editor Cloud","id":"CVE-2026-1592","kev_date_added":null,"published":"2026-02-03"},{"cvss_score":6.3,"headline":"Foxit webplugins.foxit.com Stored Cross-Site Scripting via postMessage Vulnerability","id":"CVE-2025-66500","kev_date_added":null,"published":"2025-12-19"},{"cvss_score":6.3,"headline":"Foxit pdfonline.foxit.com Stored Cross-Site Scripting in eSign Predefined Text Feature","id":"CVE-2025-66501","kev_date_added":null,"published":"2025-12-19"},{"cvss_score":6.3,"headline":"Foxit pdfonline.foxit.com Stored Cross-Site Scripting in Page Templates Feature","id":"CVE-2025-66502","kev_date_added":null,"published":"2025-12-19"},{"cvss_score":6.3,"headline":"Foxit pdfonline.foxit.com Stored Cross-Site Scripting in Layer Import Functionality","id":"CVE-2025-66519","kev_date_added":null,"published":"2025-12-19"},{"cvss_score":6.3,"headline":"Foxit pdfonline.foxit.com Stored Cross-Site Scripting in Portfolio SVG Handling","id":"CVE-2025-66520","kev_date_added":null,"published":"2025-12-19"}],"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":"2025-12-19","vendors":["Foxit Software Inc."]},"summary":"Attackers can inject malicious scripts via certificate names in Foxit PDF Online, leading to script execution when the Trusted Certificates view is loaded.","url":"https://insights.sbomify.com/CVE-2025-66521/"}