CVE-2024-7524

Name: CVE-2024-7524
Creator: NVD / NIST
Published: 2024-08-06T13:15:57.357+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.46%

Last modified Jun 17, 2026

CVE-2024-7524 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Firefox adds web-compatibility shims in place of some tracking scripts blocked by Enhanced Tracking Protection. On a site protected by Content Security Policy in "strict-dynamic" mode, an attacker able to inject an HTML element could have used a DOM Clobbering attack on some of the shims and achieved XSS, bypassing the CSP strict-dynamic protection. EPSS estimates a 0.46% chance of exploitation in the next 30 days.

Description

Firefox adds web-compatibility shims in place of some tracking scripts blocked by Enhanced Tracking Protection. On a site protected by Content Security Policy in "strict-dynamic" mode, an attacker able to inject an HTML element could have used a DOM Clobbering attack on some of the shims and achieved XSS, bypassing the CSP strict-dynamic protection. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, and Firefox ESR < 128.1.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.46%

36.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 129.0
Mozilla	Firefox Esr	< 115.14
Mozilla	Firefox Esr	>= 116.0, < 128.1

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1909241Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2024-33/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-34/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-35/Vendor Advisory

Timeline

Published: Aug 6, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-7524?

How severe is CVE-2024-7524?

CVE-2024-7524 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.46% probability of exploitation in the next 30 days.

How do I fix CVE-2024-7524?

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-2024-7524?

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

Scan your code now

Source: NVD / NIST