Full Report
CERT Polska has received a report about 3 vulnerabilities (from CVE-2026-57309 to CVE-2026-57311) found in Windu CMS software.
Analysis Summary
# Vulnerability: Multiple Flaws in Windu CMS
## CVE Details
- **CVE ID:** CVE-2026-57309
- **CVSS Score:** Not explicitly provided in the source (Estimated: Critical/High)
- **CWE:** CWE-89 (SQL Injection)
- **CVE ID:** CVE-2026-57310
- **CVSS Score:** Not explicitly provided in the source (Estimated: Medium)
- **CWE:** CWE-916 (Use of Password Hash With Insufficient Computational Effort)
- **CVE ID:** CVE-2026-57311
- **CVSS Score:** Not explicitly provided in the source (Estimated: High/Critical)
- **CWE:** CWE-434 (Unrestricted Upload of File with Dangerous Type)
## Affected Systems
- **Products:** Windu CMS (developed by JCD)
- **Versions:** 4.1 (Note: Other versions may also be affected)
- **Configurations:** Default installations
## Vulnerability Description
Three distinct security flaws were identified in Windu CMS:
1. **Blind SQL Injection (CVE-2026-57309):** The application fails to sanitize input in the URL path within HTTP headers, allowing for the injection of SQL commands.
2. **Weak Password Hashing (CVE-2026-57310):** User passwords are protected using outdated MD5 and SHA1 algorithms combined with a static salt, making them highly susceptible to offline cracking if the database is compromised.
3. **Unrestricted File Upload (CVE-2026-57311):** The software does not validate file types during the upload process, allowing users to upload executable scripts.
## Exploitation
- **Status:** Vulnerabilities confirmed; PoC status is implied by the detailed coordination report, but not publicly linked in the article.
- **Complexity:**
- CVE-2026-57309: Medium
- CVE-2026-57310: Low (Post-compromise)
- CVE-2026-57311: Low
- **Attack Vector:**
- CVE-2026-57309: Network (Remote unauthenticated)
- CVE-2026-57310: Local/Database Access
- CVE-2026-57311: Network (Remote authenticated)
## Impact
- **Confidentiality:** High (Data theft via SQLi; credential recovery via weak hashes)
- **Integrity:** High (Unauthorized file modification and system access)
- **Availability:** High (Potential Remote Code Execution via arbitrary file upload)
## Remediation
### Patches
No specific patch version was listed in the current advisory. Users are advised to contact the vendor (JCD) for updates regarding version 4.1.
### Workarounds
- **Input Filtering:** Implement a Web Application Firewall (WAF) to filter SQL syntax in URL paths and HTTP headers.
- **Access Control:** Restrict access to the CMS administration panel to trusted IP addresses only to mitigate the impact of CVE-2026-57311.
- **Configuration:** Disable PHP execution in directories where user-supplied files are stored (e.g., `uploads/`).
## Detection
- **Indicators of Compromise:**
- Presence of unexpected `.php` or executable files in upload directories.
- Unusual SQL syntax patterns (e.g., `UNION SELECT`, `SLEEP()`) in web server access logs.
- **Detection Methods:** Vulnerability scanners (like Artemis) can be used to identify SQL injection patterns and open upload forms.
## References
- **Vendor Advisory:** hxxps[:]//www[.]cve[.]org/CVERecord?id=CVE-2026-57309
- **Vendor Advisory:** hxxps[:]//www[.]cve[.]org/CVERecord?id=CVE-2026-57310
- **Vendor Advisory:** hxxps[:]//www[.]cve[.]org/CVERecord?id=CVE-2026-57311
- **CERT Polska CVD Policy:** hxxps[:]//cert[.]pl/en/cvd/