What is CVE-2021-39215?

CVE-2021-39215 is a high-severity vulnerability in 8x8 Jitsi Meet, classified under Improper Authentication. CVSS score: 7.5/10. Published 2021-09-15.

How severe is CVE-2021-39215?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in 8x8 Jitsi Meet

CVE-2021-39215

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.

Vulnerability class: Broken Authentication

Published 2021-09-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.012 (67.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

8x8 Jitsi Meet — versions 2.0.5963
Jitsi Jitsi-Meet — versions < 2.0.5963

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

github.com/jitsi/jitsi-meet/security/advisories/GHSA-45ff-37jm-xjfx (Third Party Advisory)
github.com/jitsi/jitsi-meet/pull/9319 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-39215?: CVE-2021-39215 is a high-severity vulnerability in 8x8 Jitsi Meet, classified under Improper Authentication. CVSS score: 7.5/10. Published 2021-09-15.
How severe is CVE-2021-39215?: High severity. CVSS v3 base score is 7.5 out of 10.