CVE-2025-43892 in Fortinet FortiProxy
A buffer over-read vulnerability in Fortinet FortiOS 7.6.0 through 7.6.2, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions may allow an authenticated remote attacker to return a portion of device memory in the redirect response via submitting a specially crafted request.
Quick answer
Fortinet FortiProxy should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- FortiProxy 7.2.x through 7.2.15
- FortiProxy 7.4.x through 7.4.13
- FortiProxy 7.6.x through 7.6.5
- FortiOS 7.2.x through 7.2.13
- FortiOS 7.4.x through 7.4.8
- FortiOS 7.6.x through 7.6.2
Fixed versions
- Upgrade to the fixed Fortinet release listed in the FortiGuard advisory
How to fix it
CVE-2025-43892 is a information disclosure issue in FortiProxy. Update from FortiProxy 7.2.x through 7.2.15 to Upgrade to the fixed Fortinet release listed in the FortiGuard advisory or newer. Keep it simple: upgrade first, then test the normal user flow.
- Find every place where FortiProxy is installed or used.
- Upgrade FortiProxy to Upgrade to the fixed Fortinet release listed in the FortiGuard advisory or a newer fixed release from the vendor.
- If you cannot upgrade right away, limit access to the affected feature until the update is done.
- Restart or redeploy the service if the product needs it after the update.
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Verify the fix
- Confirm the installed version is Upgrade to the fixed Fortinet release listed in the FortiGuard advisory or newer.
- Run a normal login, admin, and user flow to make sure the site still works.
- Check logs for new errors after the update.
Related categories
Trusted references
FAQ
What is affected by CVE-2025-43892?
Fortinet FortiProxy versions listed as affected should be reviewed: FortiProxy 7.2.x through 7.2.15, FortiProxy 7.4.x through 7.4.13, FortiProxy 7.6.x through 7.6.5, FortiOS 7.2.x through 7.2.13, FortiOS 7.4.x through 7.4.8, FortiOS 7.6.x through 7.6.2.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
How are Fixnx security risk categories chosen?
Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.