CVE-2025-68662 FinalDestination hostname matching allows SSRF protection bypass

What is CVE-2025-68662?

CVE-2025-68662 is a high-severity server-side request forgery vulnerability in Discourse Discourse, published on 28 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, a hostname validation issue in FinalDestination could allow bypassing SSRF protections under certain conditions. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. No known workarounds are available.

Weakness: CWE-918

Which versions are affected by CVE-2025-68662?

1 open source package ship an affected version, including discourse. It affects 1 product.

Products include Discourse Discourse.

How do I fix CVE-2025-68662?

Upgrade discourse to a fixed version for your release line: 3.5.4, 2025.11.2, 2025.12.1 or 2026.1.0.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2025-68662 being exploited?

There is no known exploitation of CVE-2025-68662 in the wild and no public exploit code.

Other vulnerabilities in Discourse Discourse

• CVE-2021-41163 RCE via malicious SNS subscription payload Critical 10.0
• CVE-2022-36066 Discourse vulnerable to RCE via admins uploading maliciously zipped file Critical 9.1
• CVE-2022-39356 Discourse user account takeover via email and invite link High 8.9
• CVE-2023-22468 Discourse vulnerable to Cross-site Scripting in local oneboxes High 8.8
• CVE-2026-27934 Discourse leaks private topic title and post excerpt via user action API endpoint High 8.7

All Discourse Discourse vulnerabilities

Sources

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

Also known as BIT-discourse-2025-68662, GHSA-gcfp-rjfc-925c.