CVE-2026-18988 Cross-site scripting in Easy Accordion – AI-Powered FAQ & Accordion Blocks, Product FAQ
Authenticated contributors can inject arbitrary scripts via the accordionTitleTag attribute, leading to stored XSS execution for other users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18988?
CVE-2026-18988 is a medium-severity cross-site scripting vulnerability in shapedplugin Easy Accordion – AI-Powered FAQ & Accordion Blocks, Product FAQ, published on 8 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-18988?
How do I fix CVE-2026-18988?
No fix has been published for CVE-2026-18988 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-18988 being exploited?
There is no known exploitation of CVE-2026-18988 in the wild and no public exploit code.
Sources
Also known as GHSA-fqqc-xqw4-9v56.