CVE-2020-15648

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

Using object or embed tags, it was possible to frame other websites, even if they disallowed framing using the X-Frame-Options header. This vulnerability affects Thunderbird < 78 and Firefox < 78.0.2.

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-1021

Affected software

Vendor	Product	Versions
Mozilla	Thunderbird	>= unspecified, < 78
Mozilla	Firefox	>= unspecified, < 78.0.2

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1644076Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-28/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-29/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1644076Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-28/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-29/Vendor Advisory

Timeline

Published: Aug 10, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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