How severe is CVE-2021-39215?

CVE-2021-39215 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 high, integrity none, and availability none.

Is CVE-2021-39215 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-2021-39215?

CVE-2021-39215 affects 8x8 Jitsi Meet. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39215?

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-2021-39215 published?

CVE-2021-39215 was published on 2021-09-15 and last updated on 2026-06-17.

CVE-2021-39215

CVE-2021-39215 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-287.

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-287
Affected product: 8x8 Jitsi Meet
Published: 2021-09-15
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-39215?: CVE-2021-39215 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 high, integrity none, and availability none.
Is CVE-2021-39215 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-2021-39215?: CVE-2021-39215 affects 8x8 Jitsi Meet. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39215?: 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-2021-39215 published?: CVE-2021-39215 was published on 2021-09-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:8x8:jitsi_meet:2.0.5963:*:*:*:*:*:*:*

More vulnerabilities in 8x8 Jitsi Meet

CVE-2024-44081 — Critical (CVSS 9.8): In Jitsi Meet before 2.0.9779, the functionality to share a video file was implemented in an insecure way, resulting in…
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CVE-2021-33506 — High (CVSS 7.5): jitsi-meet-prosody in Jitsi Meet before 2.0.5963-1 does not ensure that restrict_room_creation is set by default. This…
CVE-2021-39205 — Medium (CVSS 6.8): Jitsi Meet is an open source video conferencing application. Versions prior to 2.0.6173 are vulnerable to client-side…

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Other CWE-287 (Improper Authentication) vulnerabilities

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CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
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