Quick answers
- Is CVE-2026-118800 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-118800 being exploited in the wild.
- How severe is CVE-2026-118800?
- Medium severity, with a CVSS score of 6.4, published 7 November 2026.
- Which products and versions are affected?
- aBlocks – Gutenberg Blocks, User Dashboard Builder, Popup Builder, Form Builder & Animation Builder up to and including 2.18.0.
- Is there a fix for CVE-2026-118800?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-118800 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-118800?
- Check whether you run aBlocks – Gutenberg Blocks, User Dashboard Builder, Popup Builder or Form Builder & Animation Builder at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The plugin fails to sanitize the 'headingTag' parameter in the heading block before storing it to the database, resulting in stored cross-site scripting (XSS). An attacker with contributor-level privileges or above can inject arbitrary JavaScript that persists and executes in the browsers of all users who access the affected page. A fix exists in versions after 2.18.0.
Affected products
- aBlocks aBlocks – Gutenberg Blocks, User Dashboard Builder, Popup Builder, Form Builder & Animation Builder up to and including 2.18.0
Timeline
- 2026-11-07: disclosed