CVE-2020-15648

Name: CVE-2020-15648
Creator: NVD / NIST
Published: 2020-08-10T18:15:12.06+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.14%

Last modified Jun 17, 2026

CVE-2020-15648 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 1.14% chance of exploitation in the next 30 days.

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

6.5/10

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

EPSS Probability

1.14%

62.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1021

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 78.0.2
Mozilla	Thunderbird	< 78.0

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
Status: Modified

Frequently Asked Questions

What is CVE-2020-15648?

How severe is CVE-2020-15648?

CVE-2020-15648 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.14% probability of exploitation in the next 30 days.

How do I fix CVE-2020-15648?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-15648?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST