A link preview rendering issue in Rocket.Chat versions before 3.9 could lead to potential XSS attacks.
Priority LOW 28CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
A link preview rendering issue in Rocket.Chat versions before 3.9 could lead to potential XSS attacks.
Why it matters now
EPSS 0.00627 50th 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 |
|---|---|---|---|---|---|
| — | Rocket.Chat server | Fixed versions: 3.10, 3.9.4, 3.8.5 | — | No fix listed | CNA |
- Rocket.Chat server Vendor— Affected Fixed versions: 3.10, 3.9.4, 3.8.5 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* | before 3.9.0 | Vulnerable | Rocket.Chat |
- cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* Versions before 3.9.0 Vulnerable ·Rocket.Chat
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-8291
- 2026-10-03 Alias added: GHSA-5vc2-xx2f-qhg3
- 2026-10-30 EPSS moved to the 50th–90th percentile
References
More Rocket.chat vulnerabilities
- TI-2021-05772 A improper input sanitization vulnerability exists in Rocket.Chat server 3.11, 3.12 &… CVSS 3.1CRITICAL 9.8
- TI-2022-13921 SQL injection in Rocket.Chat CVSS 3.1HIGH 8.8
- TI-2026-18910 Rocket.Chat Unauthorized Access to OAuth App Details CVSS 3.1HIGH 7.7
- TI-2022-12398 Improper authentication in Rocket.Chat Mobile app CVSS 3.1MEDIUM 6.8
- TI-2022-13929 Information disclosure in Rocket.Chat CVSS 3.1MEDIUM 6.5
- TI-2022-15931 Cross-site scripting in Rocket.chat CVSS 3.1MEDIUM 5.4
Sources
- CVE-2020-8291 · CVE Program
- CVE-2020-8291 · NVD
- FIRST EPSS
- GHSA-5vc2-xx2f-qhg3 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences