{"id":"CVE-2026-18988","title":"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","summary":"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 …","severity":"medium","cvss":6.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"published":"2026-08-08","updated":"2026-08-08","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-18988","references":[{"url":"https://plugins.trac.wordpress.org/browser/easy-accordion-free/tags/3.1.2/Blocks/Includes/Render_Blocks_Template.php#L100","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/easy-accordion-free/tags/3.1.2/Blocks/Includes/Render_Blocks_Template.php#L126","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/easy-accordion-free/tags/3.1.2/Blocks/Includes/Render_Blocks_Template.php#L89","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/easy-accordion-free/tags/3.1.2/Blocks/Includes/block-attributes.php#L32","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/changeset/3637700/","label":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/6a8a5b2b-6cb0-48bf-ba03-d23b1624390d?source=cve","label":"security@wordfence.com"}],"tags":["nvd"],"epss":0.00258,"epssPercentile":0.17823,"ingestedAt":"2026-08-09T03:32:40.108Z","slug":"CVE-2026-18988","body":"## Overview\n\nThe 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":35.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}