{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-13203 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-13203 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-13203 is a medium-severity cross-site scripting vulnerability in livecomposer Live Composer – Free WordPress Website Builder, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-13203 and fix it if it is affected.\n\nWhat it is: CVE-2026-13203 is a medium-severity cross-site scripting vulnerability in livecomposer Live Composer – Free WordPress Website Builder, published on 1 Sep 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-2026-13203 in the wild and no public exploit code.\n\nAffected product: livecomposer Live Composer – Free WordPress Website 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-2026-13203/ (Markdown: https://insights.sbomify.com/CVE-2026-13203/index.md)","id":"CVE-2026-13203","markdown":"https://insights.sbomify.com/CVE-2026-13203/index.md","name":"CVE-2026-13203","record":{"aliases":["GHSA-q744-rpmq-q2gw"],"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 Contributor access can inject arbitrary scripts via the custom_id shortcode attribute, 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 Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'custom_id' shortcode attribute of the dslc_modules_section and dslc_modules_area shortcodes in versions up to, and including, 2.1.19. This is due to insufficient input sanitization and output escaping on the user-supplied attribute, which is concatenated into the HTML id=\"\" attribute of the rendered \u003cdiv\u003e element in the dslc_modules_section_front() and dslc_modules_area_front() functions without esc_attr(). This makes it possible for authenticated attackers, with Contributor-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":"Live Composer \u003c= 2.1.19 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'custom_id' Shortcode Attribute","id":"CVE-2026-13203","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":12,"next":{"headline":"Unexpected exit in certain situations with NSEC and NSEC3 both present","id":"CVE-2026-13204"},"packages":[],"prev":{"headline":"HTML Injection in OTDS Swagger UI","id":"CVE-2026-13202"},"products":["Live Composer – Free WordPress Website Builder"],"published":"2026-09-01","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":"2026-09-01","vendors":["livecomposer"]},"summary":"Authenticated attackers with Contributor access can inject arbitrary scripts via the custom_id shortcode attribute, leading to stored XSS execution on victim pages.","url":"https://insights.sbomify.com/CVE-2026-13203/"}