Bypass of Poll voting limits in Discourse
Priority LOW 21CWE-269Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-269.
Summary
Discourse is an open source discussion platform. In affected versions a vulnerability in the Polls feature allowed users to vote multiple times in a single-option poll. The problem is patched in the latest tests-passed, beta and stable versions of Discourse
Why it matters now
EPSS 0.00781 56th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| discourse | discourse | stable < 2.7.11; tests-passed < 2.8.0.beta9 | — | No fix listed | CNA |
- discourse Vendordiscourse Affected stable < 2.7.11; tests-passed < 2.8.0.beta9 Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:* | before 2.7.11 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.8.0:beta1:*:*:*:*:*:* | 2.8.0 beta1 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.8.0:beta2:*:*:*:*:*:* | 2.8.0 beta2 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.8.0:beta3:*:*:*:*:*:* | 2.8.0 beta3 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.8.0:beta4:*:*:*:*:*:* | 2.8.0 beta4 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.8.0:beta5:*:*:*:*:*:* | 2.8.0 beta5 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.8.0:beta6:*:*:*:*:*:* | 2.8.0 beta6 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.8.0:beta7:*:*:*:*:*:* | 2.8.0 beta7 | Vulnerable | discourse |
- cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:* Versions before 2.7.11 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.8.0:beta1:*:*:*:*:*:* Versions 2.8.0 beta1 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.8.0:beta2:*:*:*:*:*:* Versions 2.8.0 beta2 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.8.0:beta3:*:*:*:*:*:* Versions 2.8.0 beta3 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.8.0:beta4:*:*:*:*:*:* Versions 2.8.0 beta4 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.8.0:beta5:*:*:*:*:*:* Versions 2.8.0 beta5 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.8.0:beta6:*:*:*:*:*:* Versions 2.8.0 beta6 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.8.0:beta7:*:*:*:*:*:* Versions 2.8.0 beta7 Vulnerable ·discourse
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-43793
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