CVE-2020-25820

Bigbluebutton vulnerability

CVSS

6.5

EPSS

8.9%

EPSS pct

95th

Exploited

No known

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 vendor

Bigbluebutton

Affected product

Bigbluebutton

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness type (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

Published

2020-10-21

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to high impact to confidentiality.

Its EPSS score of 8.9% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2020-25820

Confirm whether Bigbluebutton Bigbluebutton is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2020-25820.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2020-25820

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2020-25820 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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