Medium severity · published Nov 13, 2017
CVE-2017-7739
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…
6.1
CVSS
1.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 65% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
FortiOS · Fortinet
5.2.0; 5.2.1; 5.2.2; 5.2.3; 5.2.4; 5.2.5; +13 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-7739
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-7739
Third Party Advisory
http://www.securityfocus.com/bid/101679
Third Party Advisory
http://www.securitytracker.com/id/1039741
Issue Tracking
https://fortiguard.com/advisory/FG-IR-17-168
More from FortiOS
9.8
CVE-2026-24858
Fortinet Multiple Products Authentication Bypass Using an Alternate Path or Channel Vulnerability
9.8
CVE-2025-25249
Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability
9.8
CVE-2025-59718
Fortinet Multiple Products Improper Verification of Cryptographic Signature Vulnerability
9.8
CVE-2024-55591
Fortinet FortiOS and FortiProxy Authentication Bypass Vulnerability
9.8
CVE-2024-23113
Fortinet Multiple Products Format String Vulnerability