Hostname Validation Issue in Discourse Discussion Platform
CVE-2025-68662

7.6HIGH

Key Information:

Vendor

Discourse
Status
Discourse
Vendor
CVE Published:
28 January 2026

What is CVE-2025-68662?

A hostname validation issue has been identified in the Discourse discussion platform, affecting versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. This vulnerability allows an attacker to potentially bypass Server-Side Request Forgery (SSRF) protections under specific conditions. Users and administrators are urged to upgrade to the patched versions as no workarounds are available to mitigate this issue.

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Deploy the Patch

Affected Version(s)

discourse < 3.5.4 < 3.5.4

discourse >= 2025.11.0-latest, < 2025.11.2 < 2025.11.0-latest, 2025.11.2

discourse >= 2025.12.0-latest, < 2025.12.1 < 2025.12.0-latest, 2025.12.1

References

https://github.com/discourse/discourse/security/advisorie...
x_refsource_CONFIRM

CVSS V3.1

Score:
7.6
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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