CVE-2021-23982

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

Using techniques that built on the slipstream research, a malicious webpage could have scanned both an internal network's hosts as well as services running on the user's local machine utilizing WebRTC connections. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-326

Affected software

Vendor	Product	Versions
Mozilla	Firefox ESR	>= unspecified, < 78.9
Mozilla	Firefox	>= unspecified, < 87
Mozilla	Thunderbird	>= unspecified, < 78.9

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1677046Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-10/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-11/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-12/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1677046Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-10/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-11/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-12/Vendor Advisory

Timeline

Published: Mar 31, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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