CVE-2026-32593 Overview
CVE-2026-32593 is a SQL injection vulnerability in Winter CMS, a content management system built on the Laravel PHP framework. The flaw affects versions up to and including 1.2.12. The backend Filter widget accepts unsanitized input through the numberrange scope type when that scope is configured with a conditions key. An authenticated backend user can inject arbitrary SQL and read database contents. The issue is fixed in version 1.2.13.
Critical Impact
Authenticated backend users can extract arbitrary database contents when a third-party plugin registers a numberrange filter scope with a conditions key. Vanilla Winter CMS installations are not affected.
Affected Products
- Winter CMS versions up to and including 1.2.12
- Third-party plugins that register a numberrange filter scope with a conditions key
- Laravel-based Winter CMS backend Filter widget component
Discovery Timeline
- 2026-08-26 - CVE-2026-32593 published to the National Vulnerability Database (NVD)
- 2026-08-26 - Last updated in NVD database
Technical Details for CVE-2026-32593
Vulnerability Analysis
The vulnerability resides in the backend Filter widget's handling of the numberrange scope type. When plugin authors configure such a scope with a conditions key, Winter CMS interpolates the user-supplied filter values directly into the raw SQL conditions statement. The interpolation occurs without parameter binding, breaking the boundary between SQL code and user data. This is a classic SQL injection pattern classified under CWE-89.
Exploitation requires an authenticated backend account with access to a list view whose filter uses the vulnerable scope configuration. The attacker submits crafted values through the filter's AJAX handler. The values pass into the query builder and execute as part of the underlying SQL statement. An attacker with only low privileges can read sensitive data across the database.
Root Cause
The root cause is direct string interpolation of filter values into a raw SQL conditions fragment. Laravel's Eloquent and query builder provide parameter binding to prevent injection, but the Winter CMS Filter widget bypassed those safeguards for the numberrange scope type. Any input reaching the conditions template was treated as trusted SQL syntax.
Attack Vector
An authenticated backend user submits a crafted numeric range value through the AJAX endpoint that applies list filters. The malicious payload closes the expected numeric expression and appends attacker-controlled SQL. Because no built-in Winter CMS views ship with this scope-configuration combination, exploitation depends on the presence of a vulnerable third-party plugin. See the GitHub Security Advisory GHSA-m7jc-g4rc-jmvh for the vendor's technical description.
No verified public exploit code is available. The vulnerability mechanism is described in prose above and in the linked advisory.
Detection Methods for CVE-2026-32593
Indicators of Compromise
- Unusual SQL syntax such as UNION SELECT, comment sequences, or stacked queries in web server access logs for backend filter AJAX endpoints
- Backend user sessions issuing repeated filter requests against list views registered by third-party plugins
- Database query logs showing malformed numberrange values or unexpected column enumeration patterns
Detection Strategies
- Audit installed third-party plugins for filter scope definitions that combine the numberrange type with a conditions key
- Inspect Laravel query logs for raw SQL fragments containing filter values that are not parameter-bound
- Correlate authenticated backend session identifiers with anomalous SQL error responses returned by the AJAX filter handler
Monitoring Recommendations
- Enable verbose query logging for Winter CMS backend requests during patch rollout
- Alert on HTTP 500 responses from backend filter AJAX endpoints paired with SQL syntax errors
- Monitor backend accounts for privilege changes or unexpected access to list views tied to third-party plugins
How to Mitigate CVE-2026-32593
Immediate Actions Required
- Upgrade Winter CMS to version 1.2.13 or later, which introduces parameter binding for the numberrange scope
- Inventory all installed plugins and identify any that register a numberrange filter scope with a conditions key
- Rotate backend user credentials if suspicious filter activity appears in access logs
- Restrict backend access to trusted administrators until the patch is applied
Patch Information
The fix is included in Winter CMS 1.2.13. Review the upstream fix in the GitHub commit 50713de95adf, which replaces string interpolation with bound parameters in the Filter widget's numberrange handler. Plugin authors should also review their own scope definitions to confirm they do not reintroduce raw SQL interpolation.
Workarounds
- Temporarily disable third-party plugins that register vulnerable filter scope configurations until upgrade is complete
- Remove the conditions key from affected numberrange scopes and rely on default query builder behavior
- Limit backend user accounts and remove access to list views that depend on vulnerable plugins
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
