Full Report
CERT Polska has received a report about 6 vulnerabilities (from CVE-2026-54219 to CVE-2026-54224) found in UBB.threads software.
Analysis Summary
# Vulnerability: Multiple Flaws in UBB.threads Forum Software
## CVE Details
- **CVE-2026-54219**: Stored XSS (CWE-79)
- **CVE-2026-54220**: Cross-Site Request Forgery (CWE-352)
- **CVE-2026-54221**: Reflected XSS (CWE-79)
- **CVE-2026-54222**: Blind SQL Injection (CWE-89)
- **CVE-2026-54223**: Path Traversal (CWE-22)
- **CVE-2026-54224**: Denial of Service (CWE-405)
- **CVSS Score**: Not specifically listed in the source, but impacts range from Medium to Critical (RCE and SQLi).
## Affected Systems
- **Products**: UBB Systems UBB.threads
- **Versions**: All versions through **7.7.5**.
- **Configurations**: Default installations; specific features like user profiles, templates, and the Control Panel.
## Vulnerability Description
UBB.threads suffers from six distinct security flaws:
1. **Stored XSS (CVE-2026-54219):** Lack of sanitization in user posts and profile fields allows persistent script injection.
2. **CSRF (CVE-2026-54220):** Missing anti-forgery tokens allow attackers to trick authenticated users into performing unauthorized actions.
3. **Reflected XSS (CVE-2026-54221):** Improper handling of request parameters allows script execution via crafted links.
4. **Blind SQL Injection (CVE-2026-54222):** Insufficient sanitization in the "Members" section of the Control Panel allows time/boolean-based data extraction.
5. **Path Traversal (CVE-2026-54223):** Flaws in the template editor allow reading/writing arbitrary files on the server.
6. **Denial of Service (CVE-2026-54224):** Resource exhaustion (Asymmetric Resource Consumption) triggered by concurrent requests to profiles on high-user-count instances.
## Exploitation
- **Status**: Disclosed via CVD (Coordinated Vulnerability Disclosure). No mention of active exploitation in the wild, but technical details are public.
- **Complexity**: Low to Medium.
- **Attack Vector**: Network/Remote.
## Impact
- **Confidentiality**: **High**. Attackers can extract database contents (SQLi) and read server files (Path Traversal).
- **Integrity**: **High**. Attackers can modify files/templates, leading to **Remote Code Execution (RCE)**.
- **Availability**: **High**. Authenticated attackers can crash the application or exhaust database resources (DoS).
## Remediation
### Patches
- **No official patches available.** CERT Polska reported that vendor contact attempts (UBB Systems) were unsuccessful.
### Workarounds
- **Disable Template Editing**: Restrict or disable access to the template editor to prevent Path Traversal/RCE.
- **Access Control**: Limit access to the Control Panel to trusted IP addresses only.
- **WAF Implementation**: Utilize a Web Application Firewall to filter common SQLi and XSS patterns.
- **Input Filtering**: Manually implement sanitization for user posts and profile fields if possible.
## Detection
- **Indicators of Compromise**:
- Presence of `<script>` tags in database tables (posts/profiles).
- Web server logs showing `../` directory traversal sequences in template-related requests.
- Unusual time-delays in SQL queries (indicative of Blind SQLi).
- **Detection Tools**: Security vulnerability scanners (like Artemis) and manual auditing of user-generated content.
## References
- **CERT Polska Advisory**: hxxps[://]cert[.]pl/en/posts/2026/06/vulnerabilities-in-ubb-threads/
- **CVE Repositories**:
- hxxps[://]www[.]cve[.]org/CVERecord?id=CVE-2026-54219
- hxxps[://]www[.]cve[.]org/CVERecord?id=CVE-2026-54223
- **CVD Policy**: hxxps[://]cert[.]pl/en/cvd/