CVE-2023-23781 Memory corruption in FortiWeb

What is CVE-2023-23781?

CVE-2023-23781 is a medium-severity memory corruption vulnerability in Fortinet Fortiweb, published on 16 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A stack-based buffer overflow vulnerability [CWE-121] in FortiWeb version 7.0.1 and below, 6.4 all versions, version 6.3.19 and below SAML server configuration may allow an authenticated attacker to achieve arbitrary code execution via specifically crafted XML files.

Weakness: CWE-787, CWE-121

Which versions are affected by CVE-2023-23781?

It affects 1 product.

Products include Fortinet Fortiweb.

How do I fix CVE-2023-23781?

No fix has been published for CVE-2023-23781 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-23781 being exploited?

There is no known exploitation of CVE-2023-23781 in the wild and no public exploit code.

Other vulnerabilities in Fortinet Fortiweb

• CVE-2025-25257 Fortinet FortiWeb SQL Injection Exploited Critical 9.6
• CVE-2025-64446 Fortinet FortiWeb Path Traversal Exploited Critical 9.4
• CVE-2025-58034 Fortinet FortiWeb OS Command Injection Exploited Medium 6.7
• CVE-2020-29015 SQL injection in Fortinet FortiWeb Critical 9.8
• CVE-2020-29016 Memory corruption in Fortinet FortiWeb Critical 9.8

All Fortinet Fortiweb vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-gvqr-h2cc-jf46.