What’s Vulnerable › Vulnerabilities

CVE-2021-34821

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-19 · updated 2026-06-17
• Weakness: CWE-79

Description

Cross Site Scripting (XSS) vulnerability exists in AAT Novus Management System through 1.51.2. The WebUI has wrong HTTP 404 error handling implemented. A remote, unauthenticated attacker may be able to exploit the issue by sending malicious HTTP requests to non-existing URIs. The value of the URL path filename is copied into the HTML document as plain text tags.

Affected products

• Aat Novus Management System: through 1.51.2

References

• https://seclists.org/fulldisclosure/2021/Jul/20
• https://seclists.org/fulldisclosure/2021/Jul/20

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