How severe is CVE-2021-33506?

CVE-2021-33506 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-33506 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33506?

CVE-2021-33506 affects 8x8 Jitsi Meet. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33506?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-33506 published?

CVE-2021-33506 was published on 2021-05-26 and last updated on 2026-06-17.

CVE-2021-33506

CVE-2021-33506 is a high-severity vulnerability in 8x8 Jitsi Meet with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-276.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-276
Affected product: 8x8 Jitsi Meet
Published: 2021-05-26
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-33506?: CVE-2021-33506 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-33506 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33506?: CVE-2021-33506 affects 8x8 Jitsi Meet. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33506?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-33506 published?: CVE-2021-33506 was published on 2021-05-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:8x8:jitsi_meet:*:*:*:*:*:*:*:*

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