Security readout for executives and security teams
Plain-English summary
This affects Jitsi Meet video conferencing deployments before 2.0.6173. A user could be exposed to malicious client-side content if tricked into interacting with a crafted scenario, potentially enabling data theft or content manipulation in the browser. Vendor sources say there are no known in-the-wild incidents and no workaround other than upgrading.
Executive priority
Schedule remediation through the normal vulnerability process, with faster handling for public Jitsi Meet services. This is not described as actively exploited, but it affects browser trust in a conferencing platform and has high confidentiality and integrity impact if exploited.
Technical view
The flaw is client-side XSS/content spoofing caused by prototype pollution: injected properties in JSON objects were not properly escaped. CVSS 3.1 is 6.8 with network attack vector, high attack complexity, no privileges required, and user interaction required. The affected product is jitsi-meet before 2.0.6173.
Likely exposure
Exposure is limited to organizations running Jitsi Meet versions earlier than 2.0.6173. Internet-facing conferencing services carry higher practical risk because untrusted users and links are more common. The bundle does not identify affected hosted services, plugins, or downstream packages beyond jitsi-meet.
Exploitation context
The sources state there are no known incidents of exploitation in the wild, and the CVE is not listed as KEV in the bundle. Exploitation requires user interaction and high attack complexity, but successful exploitation could affect confidentiality and integrity in the client browser.
Researcher notes
Key research points are prototype pollution leading to DOM-based XSS/content spoofing and improper escaping of injected JSON object properties. The source bundle names the fix version and related pull requests, but does not provide safe detection logic, exploit indicators, or alternative mitigations.
Mitigation direction
- Upgrade Jitsi Meet to version 2.0.6173 or later.
- Prioritize internet-facing or externally accessible meeting deployments.
- Check Jitsi advisory for any newer vendor guidance.
- If upgrade is delayed, document residual risk because no workaround is named.
Validation and detection
- Inventory all Jitsi Meet deployments and record running versions.
- Confirm each deployment is at least version 2.0.6173.
- Review change records for completion of the Jitsi Meet upgrade.
- Do not treat lack of exploit indicators as proof of safety.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-1321: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-39205 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N1.65.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/jitsi/jitsi-meet/security/advisories/GHSA-6582-8v9q-v3fgCVE reference · x_refsource_CONFIRM
- https://github.com/jitsi/jitsi-meet/pull/9320CVE reference · x_refsource_MISC
- https://github.com/jitsi/jitsi-meet/pull/9404CVE reference · x_refsource_MISC
- https://hackerone.com/reports/1214493CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.