Full Report
Cross-site Scripting vulnerability (CVE-2026-21730) has been found in Verba software.
Analysis Summary
# Vulnerability: Stored XSS in Verint Verba Login Logging
## CVE Details
- **CVE ID**: CVE-2026-21730
- **CVSS Score**: Not explicitly provided in the source (Estimate: Medium/High due to session hijacking potential)
- **CWE**: CWE-79 (Improper Neutralization of Input During Web Page Generation / Cross-site Scripting)
## Affected Systems
- **Products**: Verint Verba (Recording and Compliance software)
- **Versions**: All versions prior to 10.0.6
- **Configurations**: Default installations utilizing the web application's internal log viewer.
## Vulnerability Description
Verint Verba is affected by a Stored Cross-Site Scripting (XSS) vulnerability located within its login logging mechanism. The application records failed login attempts, specifically capturing the provided username. Because the application fails to sanitize or neutralize input in the username field before storing it and subsequently rendering it in the log viewer, a remote attacker can inject malicious JavaScript.
The payload is "stored" in the database/log files and is triggered when an administrative user views the application logs via the web interface.
## Exploitation
- **Status**: Discovered via responsible disclosure; no confirmed reports of exploitation in the wild.
- **Complexity**: Low
- **Attack Vector**: Network (Unauthenticated)
## Impact
- **Confidentiality**: High (Attacker can steal administrator session cookies or access sensitive data displayed in the web console)
- **Integrity**: Medium (Attacker can perform actions on behalf of the administrator)
- **Availability**: Low (Can be used for defacement of the log management console)
## Remediation
### Patches
- **Verint Verba version 10.0.6**: This version includes a fix that properly sanitizes input. Users are advised to upgrade immediately.
### Workarounds
- **Restrict Access**: Limit access to the Verba web management interface to trusted internal networks or specific IP addresses.
- **Log Monitoring**: Use external SIEM/Log management tools to review logs instead of the built-in web log viewer until the patch is applied.
## Detection
- **Indicators of Compromise**: Monitor logs for unusual characters (e.g., `<script>`, `onerror=`, `alert()`) in the "username" field of failed login events.
- **Detection methods**: Security teams can audit the `verba_web` logs or database tables storing login attempts for script tags or encoded JS payloads.
## References
- **CERT Polska Advisory**: hxxps[://]cert[.]pl/en/posts/2026/05/CVE-2026-21730/
- **CVE Record**: hxxps[://]www[.]cve[.]org/CVERecord?id=CVE-2026-21730
- **CWE-79 Details**: hxxps[://]cwe[.]mitre[.]org/data/definitions/79[.]html