CVE-2026-18988

medium

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.

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/6a8a5b2b-6cb0-48bf-ba03-d23b1624390d?source=cve

https://plugins.trac.wordpress.org/changeset/3637700/

https://plugins.trac.wordpress.org/browser/easy-accordion-free/tags/3.1.2/Blocks/Includes/block-attributes.php#L32

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/Render_Blocks_Template.php#L126

https://plugins.trac.wordpress.org/browser/easy-accordion-free/tags/3.1.2/Blocks/Includes/Render_Blocks_Template.php#L100

Details

Source: Mitre, NVD

Published: 2026-08-08

Updated: 2026-08-08

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.4

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.00266