CVE-2017-3133

MEDIUM NUCLEI

Fortinet FortiOS < 5.6.0 - Cross-Site Scripting via SSL-VPN Replacement Message

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-3133. PoCs published by patryk_bogdan. A Nuclei detection template is also available.

AI-analyzed exploit summary This exploit demonstrates multiple XSS vulnerabilities in FortiOS <= 5.6.0, including reflected and stored XSS in various web UI components. The PoC includes HTTP requests and responses showing successful exploitation.

Description

A Cross-Site Scripting vulnerability in Fortinet FortiOS versions 5.6.0 and earlier allows attackers to execute unauthorized code or commands via the Replacement Message HTML for SSL-VPN.

Exploits (1)

exploitdb WORKING POC VERIFIED
by patryk_bogdan · textwebappshardware
https://www.exploit-db.com/exploits/42388

This exploit demonstrates multiple XSS vulnerabilities in FortiOS <= 5.6.0, including reflected and stored XSS in various web UI components. The PoC includes HTTP requests and responses showing successful exploitation.

Classification
Working Poc 100%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: FortiOS versions up to 5.6.0
Auth required
Prerequisites: Access to the FortiOS web interface · Valid session cookies for authenticated XSS
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Nuclei Templates (1)

Fortinet FortiOS < 5.6.0 - Cross-Site Scripting
MEDIUMby ritikchaddha
Shodan: http.html:"/remote/login" "xxxxxxxx" || http.favicon.hash:945408572 || cpe:"cpe:2.3:o:fortinet:fortios"

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/100009
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1039020
Vendor Advisory x_refsource_confirm
https://fortiguard.com/advisory/FG-IR-17-104
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/42388/

Scores

CVSS v3 6.1
EPSS 0.0887
EPSS Percentile 94.5%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (2)
fortinet/fortios < 5.6.0
Fortinet, Inc./Fortinet FortiOS FortiOS versions 5.6.0 and earlier
Published Sep 12, 2017
Tracked Since Feb 18, 2026