A reflected Cross-site Scripting (XSS) vulnerability in web proxy disclaimer response web pages in Fortinet FortiOS 5.6.0, 5.4.0 to 5.4.5, 5.2.0 to 5.2.11 allows an unauthenticated attacker to inject arbitrary web script or HTML in the context of the victim's browser via sending a maliciously crafted URL to the victim.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.1, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, limited integrity, for affected systems. Impacting 1 product from fortinet organizations running these solutions should prioritize assessment and patching.
First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2017-11-13T14:29:00.947
2026-06-17T01:25:05.943
Modified
CVSSv3.0: 6.1 (MEDIUM)
AV:N/AC:M/Au:N/C:N/I:P/A:N
8.6
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | fortinet | fortios | 5.2.0 | Yes |
| Operating System | fortinet | fortios | 5.2.1 | Yes |
| Operating System | fortinet | fortios | 5.2.2 | Yes |
| Operating System | fortinet | fortios | 5.2.3 | Yes |
| Operating System | fortinet | fortios | 5.2.4 | Yes |
| Operating System | fortinet | fortios | 5.2.5 | Yes |
| Operating System | fortinet | fortios | 5.2.6 | Yes |
| Operating System | fortinet | fortios | 5.2.7 | Yes |
| Operating System | fortinet | fortios | 5.2.8 | Yes |
| Operating System | fortinet | fortios | 5.2.9 | Yes |
| Operating System | fortinet | fortios | 5.2.10 | Yes |
| Operating System | fortinet | fortios | 5.2.11 | Yes |
| Operating System | fortinet | fortios | 5.4.0 | Yes |
| Operating System | fortinet | fortios | 5.4.1 | Yes |
| Operating System | fortinet | fortios | 5.4.2 | Yes |
| Operating System | fortinet | fortios | 5.4.3 | Yes |
| Operating System | fortinet | fortios | 5.4.4 | Yes |
| Operating System | fortinet | fortios | 5.4.5 | Yes |
| Operating System | fortinet | fortios | 5.6.0 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For fortinet's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.