How severe is CVE-2021-39205?

CVE-2021-39205 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2021-39205 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-2021-39205?

CVE-2021-39205 affects 8x8 Jitsi Meet. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39205?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-39205 published?

CVE-2021-39205 was published on 2021-09-15 and last updated on 2026-06-17.

CVE-2021-39205

CVE-2021-39205 is a medium-severity vulnerability in 8x8 Jitsi Meet with a CVSS 3.x base score of 6.8. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
CVSS v2: 4.3
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: 8x8 Jitsi Meet
Published: 2021-09-15
Last modified: 2026-06-17

Description

Jitsi Meet is an open source video conferencing application. Versions prior to 2.0.6173 are vulnerable to client-side cross-site scripting via injecting properties into JSON objects that were not properly escaped. There are no known incidents related to this vulnerability being exploited in the wild. This issue is fixed in Jitsi Meet version 2.0.6173. There are no known workarounds aside from upgrading.

Frequently asked questions

What is CVE-2021-39205?: Jitsi Meet is an open source video conferencing application. Versions prior to 2.0.6173 are vulnerable to client-side cross-site scripting via injecting properties into JSON objects that were not properly escaped. There are no known incidents related to this vulnerability being exploited in the wild. This issue is fixed in Jitsi Meet version 2.0.6173. There are no known workarounds aside from upgrading.
How severe is CVE-2021-39205?: CVE-2021-39205 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2021-39205 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-2021-39205?: CVE-2021-39205 affects 8x8 Jitsi Meet. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39205?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-39205 published?: CVE-2021-39205 was published on 2021-09-15 and last updated on 2026-06-17.

References

Affected products (1)

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

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