What is CVE-2021-33506?

CVE-2021-33506 is a high-severity vulnerability in 8x8 Jitsi Meet, classified under Incorrect Default Permissions. CVSS score: 7.5/10. Published 2021-05-26.

How severe is CVE-2021-33506?

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

Vulnerability in 8x8 Jitsi Meet

CVE-2021-33506

jitsi-meet-prosody in Jitsi Meet before 2.0.5963-1 does not ensure that restrict_room_creation is set by default. This can allow an attacker to circumvent conference moderation.

Published 2021-05-26 · 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:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.012 (66.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.2% 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

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

References

github.com/jitsi/jitsi-meet/pull/9252/files (Patch, Third Party Advisory)
github.com/jitsi/jitsi-meet/compare/5025...5026 (Patch, Third Party Advisory)
github.com/jitsi/security-advisories/blob/master/advisories/JSA-2021-0001.md (Third Party Advisory)

Frequently asked questions

What is CVE-2021-33506?: CVE-2021-33506 is a high-severity vulnerability in 8x8 Jitsi Meet, classified under Incorrect Default Permissions. CVSS score: 7.5/10. Published 2021-05-26.
How severe is CVE-2021-33506?: High severity. CVSS v3 base score is 7.5 out of 10.