CVE-2026-96840 (GCVE-0-2026-96840)

Vulnerability from cvelistv5 – Published: 2026-10-10 06:40 – Updated: 2026-10-10 06:40
VLAI
Title
Post Grid Gutenberg Blocks <= 5.1.0 - Unauthenticated Stored Cross-Site Scripting via display_name User Field
Summary
The Post Grid Gutenberg Blocks – PostX plugin for WordPress is vulnerable to Stored Cross-Site Scripting via display_name User Field in all versions up to, and including, 5.1.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. WordPress core's pre_user_display_name filter encodes &, <, and > but leaves double-quotes intact (ENT_NOQUOTES), allowing a Subscriber-level user to store a double-quote in their display_name via /wp-admin/profile.php that subsequently breaks out of the alt="" attribute at Archive_Title.php:144.
Severity
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2215 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
wpxpo Post Grid Gutenberg Blocks – PostX Affected: 0 , ≤ 5.1.0 (semver)
guessed Create a notification for this product.
Credits
dzaku
Show details on NVD website
To clipboard 

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          "time": "2026-09-23T18:14:28.000Z",
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          "time": "2026-10-09T17:44:25.000Z",
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      "title": "Post Grid Gutenberg Blocks \u003c= 5.1.0 - Unauthenticated Stored Cross-Site Scripting via display_name User Field"
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    "dateReserved": "2026-09-23T17:59:22.479Z",
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}



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