CVE-2024-7524 : Firefox adds web-compatibility shims in place of some tracking scripts blocked b

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.

Published 2024-08-06 13:15:57

Updated 2025-03-25 17:16:13

Source Mozilla Corporation

View at NVD, CVE.org

Vulnerability category: Cross site scripting (XSS)

Products affected by CVE-2024-7524

Mozilla » Firefox
Versions before (<) 129.0
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Matching versions
Mozilla » Firefox Esr
Versions from including (>=) 116.0 and before (<) 128.1
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Matching versions
Mozilla » Firefox Esr
Versions before (<) 115.14
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2024-7524

EPSS FAQ

0.23%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 46 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2024-7524

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
6.1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	2.8	2.7	134c704f-9b21-4f2e-91b3-4a467353bcc0	2025-03-25
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None
6.1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	2.8	2.7	NIST	2024-08-29
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None

CWE ids for CVE-2024-7524

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Assigned by:
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
- nvd@nist.gov (Primary)

References for CVE-2024-7524

https://bugzilla.mozilla.org/show_bug.cgi?id=1909241

Access Denied
Issue Tracking;Permissions Required
https://www.mozilla.org/security/advisories/mfsa2024-35/

Security Vulnerabilities fixed in Firefox ESR 128.1 — Mozilla
Vendor Advisory

CVEs referencing this url
https://www.mozilla.org/security/advisories/mfsa2024-34/

Security Vulnerabilities fixed in Firefox ESR 115.14 — Mozilla
Vendor Advisory

CVEs referencing this url
https://www.mozilla.org/security/advisories/mfsa2024-33/

Security Vulnerabilities fixed in Firefox 129 — Mozilla
Vendor Advisory

CVEs referencing this url

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Vulnerability Details : CVE-2024-7524

Products affected by CVE-2024-7524

Exploit prediction scoring system (EPSS) score for CVE-2024-7524

CVSS scores for CVE-2024-7524

CWE ids for CVE-2024-7524

References for CVE-2024-7524