Displaying user badges can leak topic titles to users that have no access to the topic
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200.
Summary
Discourse is a platform for community discussion. Under certain conditions, a user badge may have been awarded based on a user's activity in a topic with restricted access. Before this vulnerability was disclosed, the topic title of the topic associated with the user badge may be viewed by any user. If there are sensitive information in the topic title, it will therefore have been exposed. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. There are currently no known workarounds available.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- 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 | up to 2.8.9; up to 2.9.0.beta10 | — | No fix listed | CNA |
- discourse Vendordiscourse Affected up to 2.8.9; up to 2.9.0.beta10 Fixed in — No fix listed CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:* | before 2.8.9 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.9.0:beta1:*:*:*:*:*:* | 2.9.0 beta1 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.9.0:beta2:*:*:*:*:*:* | 2.9.0 beta2 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.9.0:beta3:*:*:*:*:*:* | 2.9.0 beta3 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.9.0:beta4:*:*:*:*:*:* | 2.9.0 beta4 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.9.0:beta5:*:*:*:*:*:* | 2.9.0 beta5 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.9.0:beta6:*:*:*:*:*:* | 2.9.0 beta6 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.9.0:beta7:*:*:*:*:*:* | 2.9.0 beta7 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.9.0:beta8:*:*:*:*:*:* | 2.9.0 beta8 | Vulnerable | discourse |
| cpe:2.3:a:discourse:discourse:2.9.0:beta9:*:*:*:*:*:* | 2.9.0 beta9 | Vulnerable | discourse |
- cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:* Versions before 2.8.9 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.9.0:beta1:*:*:*:*:*:* Versions 2.9.0 beta1 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.9.0:beta2:*:*:*:*:*:* Versions 2.9.0 beta2 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.9.0:beta3:*:*:*:*:*:* Versions 2.9.0 beta3 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.9.0:beta4:*:*:*:*:*:* Versions 2.9.0 beta4 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.9.0:beta5:*:*:*:*:*:* Versions 2.9.0 beta5 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.9.0:beta6:*:*:*:*:*:* Versions 2.9.0 beta6 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.9.0:beta7:*:*:*:*:*:* Versions 2.9.0 beta7 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.9.0:beta8:*:*:*:*:*:* Versions 2.9.0 beta8 Vulnerable ·discourse
- cpe:2.3:a:discourse:discourse:2.9.0:beta9:*:*:*:*:*:* Versions 2.9.0 beta9 Vulnerable ·discourse
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2022-39378
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