CVE-2025-68662
Published: 28 January 2026
Summary
CVE-2025-68662 is a high-severity SSRF (CWE-918) vulnerability in Discourse Discourse. Its CVSS base score is 7.6 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 21.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2025-68662 affects Discourse, an open-source discussion platform, specifically due to a hostname validation issue in its FinalDestination component. This flaw, tracked under CWE-918 (Server-Side Request Forgery), exists in versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, enabling the bypass of SSRF protections under certain conditions. The vulnerability carries a CVSS v3.1 base score of 7.6 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L), indicating network accessibility with low complexity and privilege requirements.
Exploitation requires low privileges, such as those of an authenticated user, and can occur over the network without user interaction. Attackers can achieve high confidentiality impact by bypassing SSRF controls, potentially accessing internal resources, alongside low impacts on integrity and availability.
Discourse has addressed the issue in patched versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. No known workarounds exist. Additional details are available in the GitHub security advisory at https://github.com/discourse/discourse/security/advisories/GHSA-gcfp-rjfc-925c.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-206421
Vulnerability details
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…
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2026.1.0. No known workarounds are available.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
SSRF flaw in public-facing Discourse web app directly enables exploitation of remote services via network-accessible request forgery.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
SI-2 requires timely identification, reporting, and correction of flaws like the hostname validation bypass in Discourse's FinalDestination, directly preventing SSRF exploitation through patching.
SI-10 enforces validation of inputs such as hostnames in FinalDestination, comprehensively addressing the insufficient validation that allows SSRF bypass under certain conditions.
SC-7 implements boundary protection to monitor and control outbound communications from the Discourse application, blocking unauthorized SSRF requests to internal resources.