Is CVE-2018-13383 actively exploited?

CVE-2018-13383 has no public evidence of in-the-wild exploitation as of 2025-10-24.

What is the CVSS score for CVE-2018-13383?

CVE-2018-13383 has a CVSS score of 4.3 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

How do I patch CVE-2018-13383?

Patch guidance is available from fortinet security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2018-13383.

CVE-2018-13383 - remediation guidance & executive summary

Q: Which products are affected by CVE-2018-13383?

6 products: fortinet fortiproxy, fortinet fortiproxy, fortinet fortios, fortinet fortios, fortinet fortios, and 1 more.

Description

A heap buffer overflow in Fortinet FortiOS 6.0.0 through 6.0.4, 5.6.0 through 5.6.10, 5.4.0 through 5.4.12, 5.2.14 and earlier and FortiProxy 2.0.0, 1.2.8 and earlier in the SSL VPN web portal may cause the SSL VPN web service termination for logged in users due to a failure to properly handle javascript href data when proxying webpages.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: low
Weaknesses: CWE-787 · Out-of-bounds Write CWE-787 · Out-of-bounds Write

Metadata

Primary Vendor: FORTINET
Published: 5/29/2019
Last Modified: 10/24/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

fortinet : fortiproxyfortinet : fortiproxyfortinet : fortiosfortinet : fortiosfortinet : fortiosfortinet : fortios

Remediation Guidance

Executive Summary

View on NIST NVD