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 plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 5.0.0 via the 'plus_name' parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to delete arbitrary JS/CSS files on the server, which can lead to denial of service or destruction of critical plugin and theme assets.
AI Analysis
Technical Summary
CVE-2026-15420 is a CWE-22 directory traversal vulnerability affecting the Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder plugin for WordPress. The flaw exists in all versions up to and including 5.0.0 and is exploitable via the 'plus_name' parameter. Authenticated attackers with at least subscriber privileges can leverage this to delete arbitrary JS and CSS files on the server, impacting the integrity of plugin and theme resources.
Potential Impact
The vulnerability enables authenticated users with low privileges (subscriber-level and above) to delete arbitrary JavaScript and CSS files on the server hosting the WordPress plugin. This can lead to denial of service conditions or destruction of critical plugin and theme assets, affecting website functionality and appearance. There is no indication of confidentiality or availability impact beyond file deletion, and no known exploits in the wild have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict subscriber-level access where possible and monitor for suspicious activity related to file deletions. Avoid granting unnecessary privileges to users and consider disabling or removing the affected plugin if feasible.
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 plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 5.0.0 via the 'plus_name' parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to delete arbitrary JS/CSS files on the server, which can lead to denial of service or destruction of critical plugin and theme assets.
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 affecting the Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder plugin for WordPress. The flaw exists in all versions up to and including 5.0.0 and is exploitable via the 'plus_name' parameter. Authenticated attackers with at least subscriber privileges can leverage this to delete arbitrary JS and CSS files on the server, impacting the integrity of plugin and theme resources.
Potential Impact
The vulnerability enables authenticated users with low privileges (subscriber-level and above) to delete arbitrary JavaScript and CSS files on the server hosting the WordPress plugin. This can lead to denial of service conditions or destruction of critical plugin and theme assets, affecting website functionality and appearance. There is no indication of confidentiality or availability impact beyond file deletion, and no known exploits in the wild have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict subscriber-level access where possible and monitor for suspicious activity related to file deletions. Avoid granting unnecessary privileges to users and consider disabling or removing the affected plugin if feasible.
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: 07/31/2026, 15:05:32 UTC
Last updated: 09/07/2026, 10:52:07 UTC
Views: 78
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