CVE-2020-25820
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 10.5%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 10.48% probability · 96th percentile
- Public exploits
- 1 in Exploit-DB · first 18 November 2020
- CISA KEV
- Not listed
- Weakness
- CWE-918
- Affected
- bigbluebutton/bigbluebutton
- Source
- cve@mitre.org
EPSS 10.5% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/159667/BigBlueButton-2.2.25-File-Disclosure-Server-Side-Request-Forgery.htmlExploit, Third Party Advisory
- https://github.com/bigbluebutton/bigbluebutton/commit/71fe1eac1e5bd73a2cd44bd79c001086b250e435Patch, Third Party Advisory
- https://github.com/bigbluebutton/bigbluebutton/compare/v2.2.26...v2.2.27Release Notes, Third Party Advisory
- https://www.golem.de/news/big-blue-button-das-grosse-blaue-sicherheitsrisiko-2010-151610.htmlExploit, Third Party Advisory
- https://www.redteam-pentesting.de/advisories/rt-sa-2020-005Third Party Advisory
- http://packetstormsecurity.com/files/159667/BigBlueButton-2.2.25-File-Disclosure-Server-Side-Request-Forgery.htmlExploit, Third Party Advisory
- https://github.com/bigbluebutton/bigbluebutton/commit/71fe1eac1e5bd73a2cd44bd79c001086b250e435Patch, Third Party Advisory
- https://github.com/bigbluebutton/bigbluebutton/compare/v2.2.26...v2.2.27Release Notes, Third Party Advisory
- https://www.golem.de/news/big-blue-button-das-grosse-blaue-sicherheitsrisiko-2010-151610.htmlExploit, Third Party Advisory
- https://www.redteam-pentesting.de/advisories/rt-sa-2020-005Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.