{"cve":"CVE-2026-18988","nvd":{"published":"2026-08-08T05:17:06.790","modified":"2026-08-12T21:00:52.257","status":"Deferred","description":"The Easy Accordion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'accordionTitleTag' block attribute in versions up to, and including, 3.1.8. This is due to insufficient input sanitization and output escaping in the accordion_header_renderer() function, which emits the attacker-supplied tag name using esc_attr() in an HTML tag-name context instead of tag_escape(). 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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","score":6.4},"cwes":["CWE-79"],"references":["https://plugins.trac.wordpress.org/browser/easy-accordion-free/tags/3.1.2/Blocks/Includes/Render_Blocks_Template.php#L100","https://plugins.trac.wordpress.org/browser/easy-accordion-free/tags/3.1.2/Blocks/Includes/Render_Blocks_Template.php#L126","https://plugins.trac.wordpress.org/browser/easy-accordion-free/tags/3.1.2/Blocks/Includes/Render_Blocks_Template.php#L89","https://plugins.trac.wordpress.org/browser/easy-accordion-free/tags/3.1.2/Blocks/Includes/block-attributes.php#L32","https://plugins.trac.wordpress.org/changeset/3637700/"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:47:54.990491175+00:00"},"epss":{"cve":"CVE-2026-18988","score":0.00349,"percentile":0.28543,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}