CVE-2021-39205 : Jitsi Meet is an open source video conferencing application. Versions prior to 2

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.

Published 2021-09-15 18:15:09

Updated 2022-09-10 02:45:51

Source GitHub, Inc.

View at NVD, CVE.org

Vulnerability category: Cross site scripting (XSS)

Products affected by CVE-2021-39205

8X8 » Jitsi Meet
Versions before (<) 2.0.6173
cpe:2.3:a:8x8:jitsi_meet:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-39205

EPSS FAQ

0.09%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 38 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-39205

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:P/A:N	8.6	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
6.1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	2.8	2.7	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None
6.8	MEDIUM	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N	1.6	5.2	GitHub, Inc.
Attack Vector: Network Attack Complexity: High Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: High Integrity: High Availability: None

CWE ids for CVE-2021-39205

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Assigned by:
- nvd@nist.gov (Primary)
- security-advisories@github.com (Secondary)
CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.
Assigned by:
- nvd@nist.gov (Primary)
- security-advisories@github.com (Secondary)

References for CVE-2021-39205

https://github.com/jitsi/jitsi-meet/pull/9404

fix: Checks all parts while parsing config params. by damencho · Pull Request #9404 · jitsi/jitsi-meet · GitHub
Patch;Third Party Advisory
https://github.com/jitsi/jitsi-meet/security/advisories/GHSA-6582-8v9q-v3fg

DOM-based XSS/Content Spoofing via Prototype Pollution · Advisory · jitsi/jitsi-meet · GitHub
Third Party Advisory
https://hackerone.com/reports/1214493

HackerOne
Permissions Required
https://github.com/jitsi/jitsi-meet/pull/9320

fix: Escapes some keys when parsing input. by damencho · Pull Request #9320 · jitsi/jitsi-meet · GitHub
Patch;Third Party Advisory

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Vulnerability Details : CVE-2021-39205

Products affected by CVE-2021-39205

Exploit prediction scoring system (EPSS) score for CVE-2021-39205

CVSS scores for CVE-2021-39205

CWE ids for CVE-2021-39205

References for CVE-2021-39205