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CVE-2018-13382

Published: Jun 4, 2019Updated: Oct 24, 2025 Sources: CVE List NVD BDUCWE-863
9.1CRITICAL
NVD MITRE
EPSS Score
81.7%
Top 0.4%
CISA KEV
Active Exploitation
Since Jan 10, 2022
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Nuclei · OpenVAS

Description

An Improper Authorization vulnerability in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.0 to 5.6.8 and 5.4.1 to 5.4.10 and FortiProxy 2.0.0, 1.2.0 to 1.2.8, 1.1.0 to 1.1.6, 1.0.0 to 1.0.7 under SSL VPN web portal allows an unauthenticated attacker to modify the password of an SSL VPN web portal user via specially crafted HTTP requests

In plain language

AI Act now

CVE-2018-13382 lets an outsider who can reach your Fortinet SSL VPN web portal change any VPN user’s password without logging in—typical small businesses should treat this as urgent to fix if you’re running the affected FortiOS/FortiProxy versions.

Executive summary

Fortinet FortiOS and FortiProxy have an improper authorization flaw (CWE-863) in the SSL VPN web portal that allows an unauthenticated attacker on the network to change arbitrary SSL VPN users’ passwords via specially crafted web requests.

If affected, business impact
SSL VPN account takeoverUnauthorized access to company appsPotential ransomware entry pointIncident response and downtime

What to do now

  1. Check whether you run FortiOS or FortiProxy in the affected version ranges, and confirm the SSL VPN web portal is enabled.
  2. If you are affected, upgrade immediately to the fixed versions: FortiProxy 1.2.9 or FortiOS 5.4.11.
  3. After upgrading, review authentication and SSL VPN logs for suspicious password-change activity and unusual login attempts.
  4. If you cannot upgrade right away, disable or restrict access to the SSL VPN web portal (especially from the public internet) until updates are applied.
Patch / advisory Usually a quick update

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-863

Affected Products

Fortinet
commercial·USaka forti net
fortiproxy
Security Products
fortios
Security Products
Fortinet FortiOS, FortiProxy
Security Products
Fortinet Inc.
commercial·USaka fortinet
FortiOS
Security Products

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Jan 10, 2022
Remediation due:Jul 10, 2022
Ransomware:Known ransomware use

Required action: Apply updates per vendor instructions.

Official Patch Available
Is your org exposed to CVE-2018-13382?We'll check your whole external perimeter for exposure — free. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://fortiguard.com/advisory/FG-IR-18-389
fortiguard.com
https://www.fortiguard.com/psirt/FG-IR-20-231
fortiguard.com
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-13382
cisa.gov
and 4 more references View all →

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