CVE-2020-25820
MEDIUM
6.5
CVSS Score
Published: October 21, 2020 at 01:01 PM UTC
Updated: June 17, 2026 at 03:07 AM UTC
1 product affected across 1 vendorBigbluebutton
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Severity
MEDIUM6.5
Exploit prediction
EPSS 10%
Description
BigBlueButton before 2.2.7 allows remote authenticated users to read local files and conduct SSRF attacks via an uploaded Office document that has a crafted URL in an ODF xlink field.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 2.2.27
Affected range stops below 2.2.27, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (5)
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
http://packetstormsecurity.com/files/159667/BigBlueButton-2.2.25-File-Disclosure-Server-Side-Request-Forgery.htmlx_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/bigbluebutton/bigbluebutton/commit/71fe1eac1e5bd73a2cd44bd79c001086b250e435x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/bigbluebutton/bigbluebutton/compare/v2.2.26...v2.2.27x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://www.golem.de/news/big-blue-button-das-grosse-blaue-sicherheitsrisiko-2010-151610.htmlx_refsource_MISCThird Party Advisory
Source: [email protected]
https://www.redteam-pentesting.de/advisories/rt-sa-2020-005CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-918
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