CVE-2026-18988
MediumCVSS 6.4Exploitation Probability (EPSS)
Low risk18th percentile - higher than 18% of all known CVEs
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 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 allows authenticated attackers with contributor-level access and above to inject arbitrary web scripts that execute when a user accesses an injected page.
Risk Assessment
An attacker could inject malicious scripts into WordPress pages, potentially leading to user data theft, session hijacking, or malware distribution.
Recommendation
Update the Easy Accordion plugin to the latest patched version and restrict content author permissions.
Original NVD description (English source)
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.