{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13400 exists.","fix":"No fix has been published for CVE-2026-13400 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-13400 is a medium-severity cross-site scripting vulnerability in Unknown Simply Schedule Appointments, published on 27 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-13400 and fix it if it is affected.\n\nWhat it is: CVE-2026-13400 is a medium-severity cross-site scripting vulnerability in Unknown Simply Schedule Appointments, published on 27 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13400 exists.\n\nAffected product: Unknown Simply Schedule Appointments. 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-2026-13400/ (Markdown: https://insights.sbomify.com/CVE-2026-13400/index.md)","id":"CVE-2026-13400","markdown":"https://insights.sbomify.com/CVE-2026-13400/index.md","name":"CVE-2026-13400","record":{"aliases":["GHSA-v365-26q9-f844"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"WordPress plugin","requires_auth":"none","summary":"Unauthenticated attackers can inject malicious scripts via booking information, leading to code execution or account takeover in Simply Schedule Appointments.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"WPScan","cpe":[],"cvss":{"score":6.1,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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":"Simply Schedule Appointments is vulnerable to unauthenticated Stored Cross-Site Scripting in all versions up to and including 1.6.12.2. The root cause is a sanitization-ordering defect: the rendered notification content is decoded back into live HTML after it has already passed through the Simply Schedule Appointments WordPress plugin before 1.6.12.4's wp_kses_post() filter, so a double-encoded payload survives intake and is reintroduced as an executable element at render time.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"Simply Schedule Appointments \u003c 1.6.12.4 - Unauthenticated Stored XSS via Booking Customer Information","id":"CVE-2026-13400","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"XML::Bare versions through 0.53 for Perl will hang in an infinite loop when parsing malformed attributes","id":"CVE-2026-13401"},"packages":[],"prev":{"headline":"Payment Plugins for PayPal WooCommerce \u003c 2.0.20 - Unauthenticated Payment Bypass via Reuse of a Completed PayPal Order","id":"CVE-2026-13399"},"products":["Simply Schedule Appointments"],"published":"2026-07-27","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-27","vendors":["Unknown"]},"summary":"Unauthenticated attackers can inject malicious scripts via booking information, leading to code execution or account takeover in Simply Schedule Appointments.","url":"https://insights.sbomify.com/CVE-2026-13400/"}