{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-18109 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-18109 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-18109 is a high-severity cross-site scripting vulnerability in boldgrid W3 Total Cache, published on 14 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-18109 and fix it if it is affected.\n\nWhat it is: CVE-2026-18109 is a high-severity cross-site scripting vulnerability in boldgrid W3 Total Cache, published on 14 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-18109 in the wild and no public exploit code.\n\nAffected product: boldgrid W3 Total Cache. 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-2026-18109/ (Markdown: https://insights.sbomify.com/CVE-2026-18109/index.md)","id":"CVE-2026-18109","markdown":"https://insights.sbomify.com/CVE-2026-18109/index.md","name":"CVE-2026-18109","record":{"aliases":["GHSA-9qc5-qhm2-7hh3"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"WordPress plugin","requires_auth":"none","summary":"Unauthenticated attackers can inject arbitrary scripts via comment author names in W3 Total Cache when Lazy Load Images is enabled.","user_interaction":"not_required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Wordfence","cpe":[],"cvss":{"score":7.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/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 W3 Total Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Author Name in all versions up to, and including, 2.10.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is only exploitable when the Lazy Load Images feature of W3 Total Cache is enabled, as the unsafe re-emission occurs exclusively within the LazyLoad mutator's img tag rewriting step.","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":"W3 Total Cache \u003c= 2.10.3 - Unauthenticated Stored Cross-Site Scripting via Comment Author Name","id":"CVE-2026-18109","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"Missing authorization in Concrete CMS","id":"CVE-2026-18110"},"packages":[],"prev":{"headline":"Auth bypass in Net::SAML2","id":"CVE-2026-18108"},"products":["W3 Total Cache"],"published":"2026-08-14","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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-14","vendors":["boldgrid"]},"summary":"Unauthenticated attackers can inject arbitrary scripts via comment author names in W3 Total Cache when Lazy Load Images is enabled.","url":"https://insights.sbomify.com/CVE-2026-18109/"}