High severity · published Sep 15, 2021
CVE-2021-39215
Authentication Bypass: Forged Tokens Allow Access to Arbitrary Rooms
7.5
CVSS
1.2%
EPSS
No
On KEV
Description
Jitsi Meet is an open source video conferencing application. In versions prior to 2.0.5963, a Prosody module allows the use of symmetrical algorithms to validate JSON web tokens. This means that tokens generated by arbitrary sources can be used to gain authorization to protected rooms. This issue is fixed in Jitsi Meet 2.0.5963. There are no known workarounds aside from updating.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 69% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JI
jitsi-meet · jitsi
< 2.0.5963 · source: vendor
JM
Jitsi Meet · 8x8
2.0.5963 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-39215
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-39215
Patch
https://github.com/jitsi/jitsi-meet/pull/9319
Third Party Advisory
https://github.com/jitsi/jitsi-meet/security/advisories/GHSA-45ff-37jm-xjfx
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