Stored cross-site scripting in aBlocks WordPress plugin via headingTag
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The aBlocks Gutenberg Blocks, User Dashboard Builder, Popup Builder, Form Builder and Animation Builder plugin for WordPress is affected in all versions up to and including 2.18.0. Insufficient input sanitization and output escaping of the 'headingTag' parameter lead to stored cross-site scripting (CWE-79). An authenticated attacker with Contributor-level access or higher can inject arbitrary web scripts into pages that execute whenever a user accesses an injected page.
Written with Claude Haiku 5.5 from the sources below · 2026-11-07
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| kodezen | aBlocks – Gutenberg Blocks, User Dashboard Builder, Popup Builder, Form Builder & Animation Builder | up to 2.18.0 | — | No fix listed | CNA |
- aBlocks – Gutenberg Blocks, User Dashboard Builder, Popup Builder, Form Builder & Animation Builder Vendorkodezen Affected up to 2.18.0 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for the aBlocks plugin (Gutenberg Blocks, User Dashboard Builder, Popup Builder, Form Builder & Animation Builder).
Written with Claude Haiku 5.5 from the sources below · 2026-11-07
Timeline
- 2026-11-07 Threatist record created from CVE-2026-118800
- 2026-11-07 Alias added: GHSA-q8hw-8hvr-gcp7
- 2026-11-07 CISA SSVC decision points changed
- 2026-11-07 Priority changed: MEDIUM → LOW
References
Other 5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/fc051a2a-deb8-4888-abfb-c9d5ff27b0a7?source=cve
- https://plugins.trac.wordpress.org/browser/ablocks/tags/2.18.0/includes/blocks/heading/block.php#L162
- https://plugins.trac.wordpress.org/browser/ablocks/tags/2.18.0/includes/blocks/heading/block.php#L159
- https://plugins.trac.wordpress.org/browser/ablocks/tags/2.18.0/includes/classes/block-base-abstract.php#L128
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3786225%40ablocks&new=3786225%40ablocks
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- TI-2024-25935 WordPress Academy LMS plugin <= 2.0.4 - Broken Access Control vulnerability CVSS 3.1HIGH 8.8
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- TI-2025-14160 Authorization bypass in kodezen Academy LMS – WordPress LMS Plugin for Complete eLearning… CVSS 3.1CRITICAL 9.8
- TI-2024-01406 Improper privilege management in kodezen Academy LMS – WordPress LMS Plugin for Complete… CVSS 3.1HIGH 8.8
- TI-2026-80065 Privilege escalation in aBlocks WordPress plugin CVSS 3.1HIGH 8.8
Sources
- CVE-2026-118800 · CVE Program
- CVE-2026-118800 · NVD
- FIRST EPSS
- GHSA-q8hw-8hvr-gcp7 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences