BigBlueButton Greenlight before 2.5.6 allows HTTP header (Host and Origin) attacks, which…
Priority MEDIUM 41Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
BigBlueButton Greenlight before 2.5.6 allows HTTP header (Host and Origin) attacks, which can result in Account Takeover if a victim follows a spoofed password-reset link.
Why it matters now
EPSS 0.01531 74th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:bigbluebutton:greenlight:*:*:*:*:*:*:*:* | before 2.5.6 | Vulnerable | bigbluebutton |
- cpe:2.3:a:bigbluebutton:greenlight:*:*:*:*:*:*:*:* Versions before 2.5.6 Vulnerable ·bigbluebutton
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-26163
- 2026-10-03 Alias added: GHSA-5wp7-85p7-qq6v
References
More bigbluebutton Greenlight vulnerabilities
- TI-2022-16454 BigBlueButton Greenlight Open Redirect vulnerability CVSS 3.1CRITICAL 9.1
- TI-2022-16453 BigBlueButton Greenlight Open Redirect vulnerability CVSS 3.1CRITICAL 9.1
- TI-2020-16758 A cross-site scripting (XSS) vulnerability exists in the 'merge account' functionality in… CVSS 3.1MEDIUM 6.1
- TI-2022-09840 BigBlueButton Greenlight 2.11.1 allows XSS. CVSS 3.1MEDIUM 5.4
- TI-2022-13084 Improper privilege management - Anyone can view room settings in GreenLight CVSS 3.1MEDIUM 5.3
Sources
- CVE-2020-26163 · CVE Program
- CVE-2020-26163 · NVD
- FIRST EPSS
- GHSA-5wp7-85p7-qq6v · 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