High severity · published Sep 30, 2020
CVE-2020-26163
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
8.8
CVSS
1.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
Greenlight · Bigbluebutton
before 2.5.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-26163
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-26163
Patch
https://github.com/bigbluebutton/greenlight/pull/1543
Third Party Advisory
https://github.com/bigbluebutton/greenlight/releases/tag/release-2.5.6
Exploit
https://www.sakshamanand.com/host-header-injection-bigbluebutton/
More from Greenlight
6.1
CVE-2022-36029
BigBlueButton Greenlight Open Redirect vulnerability
6.1
CVE-2022-36028
BigBlueButton Greenlight Open Redirect vulnerability
6.1
CVE-2020-27642
A cross-site scripting (XSS) vulnerability exists in the 'merge account' functionality in admins.js in BigBlueButton Greenlight 2.7.6
5.4
CVE-2022-26497
BigBlueButton Greenlight 2.11.1 allows XSS
5.3
CVE-2022-31039
Improper privilege management - Anyone can view room settings in GreenLight