CVE-2026-15420: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in posimyththemes Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder
The Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder WordPress plugin is affected by a directory traversal vulnerability in all versions up to and including 5.0.0. This vulnerability allows authenticated users with subscriber-level access or higher to delete arbitrary JavaScript and CSS files on the server via the 'plus_name' parameter. Exploitation can result in denial of service or damage to critical plugin and theme assets. The vulnerability has a medium severity rating with a CVSS score of 4.3. No official patch or remediation guidance has been provided yet.
AI Analysis
Technical Summary
CVE-2026-15420 is a CWE-22 directory traversal vulnerability in the Nexter Blocks WordPress plugin (versions up to 5.0.0). It allows authenticated attackers with subscriber-level privileges or higher to manipulate the 'plus_name' parameter to delete arbitrary JS/CSS files on the server. This can disrupt the plugin or theme functionality by removing critical assets. The vulnerability is confirmed but no vendor advisory or patch is currently available.
Potential Impact
Authenticated users with subscriber-level access or above can delete arbitrary JavaScript and CSS files on the server hosting the plugin. This can lead to denial of service or destruction of important plugin and theme files, potentially impairing website functionality and appearance. There is no indication of confidentiality or availability impact beyond file deletion.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict subscriber-level access carefully and monitor for suspicious activity related to file deletions. Avoid granting unnecessary privileges to users.
CVE-2026-15420: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in posimyththemes Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder
Description
The Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder WordPress plugin is affected by a directory traversal vulnerability in all versions up to and including 5.0.0. This vulnerability allows authenticated users with subscriber-level access or higher to delete arbitrary JavaScript and CSS files on the server via the 'plus_name' parameter. Exploitation can result in denial of service or damage to critical plugin and theme assets. The vulnerability has a medium severity rating with a CVSS score of 4.3. No official patch or remediation guidance has been provided yet.
CVSS v3.1
Score 4.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-15420 is a CWE-22 directory traversal vulnerability in the Nexter Blocks WordPress plugin (versions up to 5.0.0). It allows authenticated attackers with subscriber-level privileges or higher to manipulate the 'plus_name' parameter to delete arbitrary JS/CSS files on the server. This can disrupt the plugin or theme functionality by removing critical assets. The vulnerability is confirmed but no vendor advisory or patch is currently available.
Potential Impact
Authenticated users with subscriber-level access or above can delete arbitrary JavaScript and CSS files on the server hosting the plugin. This can lead to denial of service or destruction of important plugin and theme files, potentially impairing website functionality and appearance. There is no indication of confidentiality or availability impact beyond file deletion.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict subscriber-level access carefully and monitor for suspicious activity related to file deletions. Avoid granting unnecessary privileges to users.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-07-10T15:00:42.141Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a62de069c2644c7f835c49c
Added to database: 07/24/2026, 03:37:42 UTC
Last enriched: 07/24/2026, 03:52:16 UTC
Last updated: 07/24/2026, 04:21:12 UTC
Views: 5
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