FinalDestination hostname matching allows SSRF protection bypass
Priority MEDIUM 42CWE-918Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00327 25th percentileScored 2026-11-07
Fix Fixed discourse (discourse): 3.5.4, 2025.11.2, 2025.12.1 +1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| discourse | discourse | before 3.5.4; 2025.11.0-latest to before 2025.11.2; 2025.12.0-latest to before 2025.12.1; 2026.1.0-latest to before 2026.1.0 | 3.5.4, 2025.11.2, 2025.12.1, 2026.1.0 | Patch available | CNA |
- discourse Vendordiscourse Affected before 3.5.4; 2025.11.0-latest to before 2025.11.2; 2025.12.0-latest to before 2025.12.1; 2026.1.0-latest to before 2026.1.0 Fixed in 3.5.4, 2025.11.2, 2025.12.1, 2026.1.0 Patch available CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:* | before 3.5.4; 2025.11.0 to before 2025.11.2 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2025.12.0:*:*:*:stable:*:*:* | 2025.12.0 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2026.1.0:*:*:*:stable:*:*:* | 2026.1.0 | Vulnerable | discourse |
- cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:* Versions before 3.5.4; 2025.11.0 to before 2025.11.2 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2025.12.0:*:*:*:stable:*:*:* Versions 2025.12.0 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2026.1.0:*:*:*:stable:*:*:* Versions 2026.1.0 Vulnerable ·discourse
Remediation
- Fix · CNA discourse (discourse) Fixed in 3.5.4, 2025.11.2, 2025.12.1, 2026.1.0
Timeline
- 2026-10-02 Threatist record created from CVE-2025-68662
References
More Discourse vulnerabilities
- TI-2021-19656 Denial of Service in discourse CVSS 3.1MEDIUM 6.8
- TI-2024-36150 Potential Backup file leaked via Nginx in Discourse CVSS 3.1HIGH 7.5
- TI-2021-18002 RCE via malicious SNS subscription payload CVSS 3.1CRITICAL 10.0
- TI-2026-24651 Discourse: Open redirect via `sso_destination_url` cookie in `enter` CVSS 4.0MEDIUM 5.1
- TI-2026-22278 Discourse leaks private topic title and post excerpt via user action API endpoint CVSS 4.0HIGH 8.7
- TI-2023-24152 Unauthenticated access to new private chat messages in Discourse CVSS 3.1HIGH 7.5
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences