Discourse's canonical url not being used for topic embeddings
Priority LOW 24CWE-116Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
Discourse is an open source discussion platform. Prior to version 3.0.4 of the `stable` branch and version 3.1.0.beta5 of the `beta` and `tests-passed` branches, multiple duplicate topics could be created if topic embedding is enabled. This issue is patched in version 3.0.4 of the `stable` branch and version 3.1.0.beta5 of the `beta` and `tests-passed` branches. As a workaround, disable topic embedding if it has been enabled.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00423 36th percentileScored 2026-11-07
Fix Fixed discourse (discourse): 3.0.4, 3.1.0.beta5
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 3.0.4; 3.1.0.beta1 to before 3.1.0.beta5 | 3.0.4, 3.1.0.beta5 | Patch available | CNA |
- discourse Vendordiscourse Affected before 3.0.4; 3.1.0.beta1 to before 3.1.0.beta5 Fixed in 3.0.4, 3.1.0.beta5 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:* | before 3.0.4 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:3.1.0:beta1:*:*:beta:*:*:* | 3.1.0 beta1 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:3.1.0:beta2:*:*:beta:*:*:* | 3.1.0 beta2 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:3.1.0:beta3:*:*:beta:*:*:* | 3.1.0 beta3 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:3.1.0:beta4:*:*:beta:*:*:* | 3.1.0 beta4 | Vulnerable | discourse |
- cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:* Versions before 3.0.4 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:3.1.0:beta1:*:*:beta:*:*:* Versions 3.1.0 beta1 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:3.1.0:beta2:*:*:beta:*:*:* Versions 3.1.0 beta2 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:3.1.0:beta3:*:*:beta:*:*:* Versions 3.1.0 beta3 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:3.1.0:beta4:*:*:beta:*:*:* Versions 3.1.0 beta4 Vulnerable ·discourse
Remediation
- Fix · CNA discourse (discourse) Fixed in 3.0.4, 3.1.0.beta5
Timeline
- 2026-10-02 Threatist record created from CVE-2023-32301
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