CVE-2026-118800 json
aBlocks <= 2.18.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'headingTag' Block Attribute
published 2d ago modified 2d ago also EUVD-2026-118975
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
Summary
The aBlocks – Gutenberg Blocks, User Dashboard Builder, Popup Builder, Form Builder & Animation Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'headingTag' parameter in all versions up to, and including, 2.18.0 due to insufficient input sanitization and output escaping. 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.
Is CVE-2026-118800 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2d ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- kodezen aBlocks – Gutenberg Blocks, User Dashboard Builder, Popup Builder, Form Builder & Animation Builder
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/fc051a2a-deb8-4888-abfb-c9d5ff27b0a7?source=cve
- plugins.trac.wordpress.org /browser/ablocks/tags/2.18.0/includes/blocks/heading/block.php#L162
- plugins.trac.wordpress.org /browser/ablocks/tags/2.18.0/includes/blocks/heading/block.php#L159
- plugins.trac.wordpress.org /browser/ablocks/tags/2.18.0/includes/classes/block-base-abstract.php#L128
- plugins.trac.wordpress.org /changeset?reponame=&old=3786225%40ablocks&new=3786225%40ablocks
Sources
- CVE List CVE-2026-118800
- NVD CVE-2026-118800
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.