CVE-2021-39205

DOM-based XSS/Content Spoofing via Prototype Pollution

MEDIUM
6.1
CVSS Score
Published: September 15, 2021 at 05:15 PM UTC
Updated: June 17, 2026 at 04:03 AM UTC
2 products affected across 2 vendorsJitsi MeetJitsi Meet

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Severity
MEDIUM6.1
Exploit prediction
EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.0.6173
Affected range stops below 2.0.6173, so it looks safe — our inference, not a vendor statement
v < 2.0.6173
Affected range stops below 2.0.6173, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (4)

x_refsource_MISCPatchThird Party Advisory
https://github.com/jitsi/jitsi-meet/pull/9320
x_refsource_MISCPatchThird Party Advisory
https://github.com/jitsi/jitsi-meet/pull/9404
x_refsource_MISCPermissions Required
https://hackerone.com/reports/1214493

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79CWE-1321

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