CVE-2025-15678

Nexter Blocks < 5.0.2 - Author+ Stored XSS via SVG Upload

Published Aug 6, 2026 CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Description
The Nexter Blocks WordPress plugin before 5.0.2 does not sanitize uploaded SVG files and allows SVG uploads for any user able to upload files (Author by default), allowing them to upload a file containing malicious JavaScript that executes when the file is accessed, leading to Stored Cross-Site Scripting.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Posimyth
Posimyth nexter Blocks
Wordpress
Wordpress wordpress
Vendors & Products Posimyth
Posimyth nexter Blocks
Wordpress
Wordpress wordpress
Type Values Removed Values Added
Weaknesses CWE-79
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description The Nexter Blocks WordPress plugin before 5.0.2 does not sanitize uploaded SVG files and allows SVG uploads for any user able to upload files (Author by default), allowing them to upload a file containing malicious JavaScript that executes when the file is accessed, leading to Stored Cross-Site Scripting.
Title Nexter Blocks < 5.0.2 - Author+ Stored XSS via SVG Upload
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Aug 6, 2026, 2:39 PM
Reserved
Jul 24, 2026, 10:09 AM
Status
Deferred
Published
Aug 6, 2026, 7:16 AM
Modified
Sep 29, 2026, 2:10 PM