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CVE-2018-13382

Fortinet FortiOS and FortiProxy Improper Authorization

9.1 CRITICALActively exploited (CISA KEV)Used in ransomwareEPSS 81.7%
  1. Published4 Jun 2019
  2. Added to CISA KEV10 Jan 2022
  3. Remediation due10 Jul 2022
Actively exploited (CISA KEV)

An Improper Authorization vulnerability in Fortinet FortiOS and FortiProxy under SSL VPN web portal allows an unauthenticated attacker to modify the password.

Added to KEV: 10 Jan 2022Federal remediation due: 10 Jul 2022Used in ransomware

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

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Fortinet FortiProxy< 1.2.9 · 2.0.0
Fortinet FortiOS≥ 5.4.1 < 5.4.11 · ≥ 5.6.0 < 5.6.9 · ≥ 6.0.0 < 6.0.5

Remediation

Fixed in
Fortinet FortiProxy≥ 1.2.9
Fortinet FortiOS≥ 5.4.11

References

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Frequently asked

Is CVE-2018-13382 being actively exploited?

Yes. CVE-2018-13382 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 10 Jan 2022. It has been used in ransomware campaigns.

How severe is CVE-2018-13382?

CVE-2018-13382 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 81.7% probability of exploitation.

Which products are affected by CVE-2018-13382?

Affected products include Fortinet FortiProxy, Fortinet FortiOS.

How do I fix CVE-2018-13382?

Upgrade affected software to a fixed version, for example Fortinet FortiProxy 1.2.9, Fortinet FortiOS 5.4.11 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2018-13382 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.