{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-8981 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-8981 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-8981 is a low-severity cross-site scripting vulnerability in Unknown Custom Block Builder, published on 9 Jun 2026. 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-2026-8981 and fix it if it is affected.\n\nWhat it is: CVE-2026-8981 is a low-severity cross-site scripting vulnerability in Unknown Custom Block Builder, published on 9 Jun 2026. 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-2026-8981 in the wild and no public exploit code.\n\nAffected product: Unknown Custom Block Builder. 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-2026-8981/ (Markdown: https://insights.sbomify.com/CVE-2026-8981/index.md)","id":"CVE-2026-8981","markdown":"https://insights.sbomify.com/CVE-2026-8981/index.md","name":"CVE-2026-8981","record":{"aliases":["GHSA-cfcv-65jq-76jw"],"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 JavaScript into block templates, leading to stored XSS for site visitors.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"WPScan","cpe":[],"cvss":{"score":3.5,"severity":"low","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"The Custom Block Builder  WordPress plugin before 4.3.0 does not consistently check the unfiltered_html capability across all paths that write to its block template code fields, allowing administrators on multisite installations (or single-site installs with DISALLOW_UNFILTERED_HTML defined) to inject arbitrary JavaScript that executes for any visitor of pages embedding the affected block.","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":"Lazy Blocks \u003c 4.3.0 - Admin+ Stored XSS via Custom Block Frontend HTML","id":"CVE-2026-8981","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Hard-coded / Backdoor Accounts","id":"CVE-2026-8982"},"packages":[],"prev":{"headline":"Privilege Escalation","id":"CVE-2026-8980"},"products":["Custom Block Builder"],"published":"2026-06-09","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":"2026-06-09","vendors":["Unknown"]},"summary":"Administrators can inject arbitrary JavaScript into block templates, leading to stored XSS for site visitors.","url":"https://insights.sbomify.com/CVE-2026-8981/"}