{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-4561 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-4561 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-4561 is a medium-severity cross-site scripting vulnerability in dvankooten MC4WP: Mailchimp for WordPress, published on 22 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-4561 and fix it if it is affected.\n\nWhat it is: CVE-2026-4561 is a medium-severity cross-site scripting vulnerability in dvankooten MC4WP: Mailchimp for WordPress, published on 22 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-4561 in the wild and no public exploit code.\n\nAffected product: dvankooten MC4WP: Mailchimp for WordPress. 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-2026-4561/ (Markdown: https://insights.sbomify.com/CVE-2026-4561/index.md)","id":"CVE-2026-4561","markdown":"https://insights.sbomify.com/CVE-2026-4561/index.md","name":"CVE-2026-4561","record":{"aliases":["GHSA-fm8w-hq2c-rg96"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"WordPress plugin","requires_auth":"low_privilege","summary":"Authenticated attackers with Author access can inject arbitrary scripts via form response messages, leading to stored XSS execution on victim pages.","user_interaction":"not_required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Wordfence","cpe":[],"cvss":{"score":6.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the form response message post meta fields (e.g., 'text_subscribed', 'text_error') in all versions up to, and including, 4.12.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.","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":"Cross-site scripting in MC4WP: Mailchimp for WordPress","id":"CVE-2026-4561","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"MacCMS Timming API Endpoint Timming.php weak authentication","id":"CVE-2026-4562"},"packages":[],"prev":{"headline":"** REJECT ** DO NOT USE THIS CANDIDATE NUMBER.","id":"CVE-2026-4560"},"products":["MC4WP: Mailchimp for WordPress"],"published":"2026-08-22","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-08-24","vendors":["dvankooten"]},"summary":"Authenticated attackers with Author access can inject arbitrary scripts via form response messages, leading to stored XSS execution on victim pages.","url":"https://insights.sbomify.com/CVE-2026-4561/"}