CVE-2026-25133
MediumCVSS 4.8Exploitation Probability (EPSS)
Low risk12th percentile - higher than 12% of all known CVEs
Summary
October CMS versions prior to 3.7.14 and 4.1.10 contain a stored cross-site scripting vulnerability in the SVG sanitization logic. The regex pattern used to strip event handler attributes could be bypassed using a crafted payload, allowing malicious SVG files to be uploaded through the Media Manager with embedded JavaScript. Exploitation could lead to privilege escalation if a superuser views or embeds the malicious SVG, and requires authenticated backend access with media upload permissions.
Risk Assessment
Attackers can execute arbitrary scripts in the context of a superuser's browser, potentially leading to session theft, content modification, or further privilege escalation.
Recommendation
Update October CMS to version 3.7.14 or 4.1.10 and restrict media upload permissions.
Other vulnerabilities in October CMS
See all- CVE-2017-16941High
October CMS through 1.0.428 does not prevent the use of .htaccess in themes, allowing remote authenticated users to execute arbitrary PHP code by downloading a theme ZIP archive from /backend/cms/themes, and then uploading and importing a modified archive with two new files: a .php file and a .htaccess file.
- CVE-2017-1000195High
October CMS version 412 is vulnerable to PHP object injection in asset move functionality, allowing for the deletion of files limited by file permissions on the server.
- CVE-2017-1000119High
October CMS version 412 is vulnerable to PHP code execution in the file upload functionality, potentially leading to site compromise and possibly affecting other applications on the server.
- CVE-2017-1000197Critical
October CMS version 412 is vulnerable to file path modification in asset move functionality, potentially allowing the creation of malicious files on the server.
- CVE-2017-1000196Critical
October CMS version 412 is vulnerable to PHP code execution in the asset manager functionality, potentially leading to site compromise and possibly affecting other applications on the server.
- CVE-2017-1000194Critical
October CMS build 412 is vulnerable to Apache configuration modification via file upload functionality, potentially leading to site compromise and affecting other applications on the server.
- CVE-2026-25125Medium
October CMS before versions 3.7.14 and 4.1.10 contains a server-side information disclosure vulnerability in the INI settings parser. PHP's parse_ini_string() supports ${} syntax for environment variable interpolation, allowing attackers with Editor access to inject patterns like ${APP_KEY}, leading to exposure of sensitive environment variables.
- CVE-2023-37692Medium
Version 3.4.4 of October CMS contains a vulnerability that allows arbitrary file uploads, enabling attackers to execute arbitrary code via a crafted file.
Original NVD description (English source)
October is a Content Management System (CMS) and web platform. Versions prior to 3.7.14 and 4.1.10 contain a stored cross-site scripting (XSS) vulnerability in the SVG sanitization logic. The regex pattern used to strip event handler attributes (such as onclick or onload) could be bypassed using a crafted payload that exploits how the pattern matches attribute boundaries, allowing malicious SVG files to be uploaded through the Media Manager with embedded JavaScript. Exploitation could lead to privilege escalation if a superuser views or embeds the malicious SVG, and requires authenticated backend access with media upload permissions. The SVG must be viewed or embedded in a page for the payload to trigger. This issue has been fixed in versions 3.7.14 and 4.1.10.