CVE-2021-39215

Name: CVE-2021-39215
Creator: NVD / NIST
Published: 2021-09-15T18:15:09.323+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.20%

Last modified Jun 17, 2026

CVE-2021-39215 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.20% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.20%

64.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
8x8	Jitsi Meet	2.0.5963

References

https://github.com/jitsi/jitsi-meet/pull/9319Patch, Third Party Advisory
https://github.com/jitsi/jitsi-meet/security/advisories/GHSA-45ff-37jm-xjfxThird Party Advisory
https://github.com/jitsi/jitsi-meet/pull/9319Patch, Third Party Advisory
https://github.com/jitsi/jitsi-meet/security/advisories/GHSA-45ff-37jm-xjfxThird Party Advisory

Timeline

Published: Sep 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39215?

How severe is CVE-2021-39215?

CVE-2021-39215 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.20% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39215?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-39215?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST