Vulnerability Details : 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.
Products affected by CVE-2020-26163
- cpe:2.3:a:bigbluebutton:greenlight:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-26163
0.63%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 79 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-26163
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
References for CVE-2020-26163
-
https://github.com/bigbluebutton/greenlight/releases/tag/release-2.5.6
Release release-2.5.6 · bigbluebutton/greenlight · GitHubThird Party Advisory
-
https://github.com/bigbluebutton/greenlight/pull/1543
GRN2-xx: Added SAFE_HOSTS env variable to block unknown hosts by farhatahmad · Pull Request #1543 · bigbluebutton/greenlight · GitHubPatch;Third Party Advisory
-
https://www.sakshamanand.com/host-header-injection-bigbluebutton/
Host Header Injection – BigBlueButton – Saksham AnandExploit;Third Party Advisory
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