CVE-2024-7520

HIGH
Published Aug 6, 2024 Modified Mar 24, 2025 CWE-843 CWE-94

Description

A type confusion bug in WebAssembly could be leveraged by an attacker to potentially achieve code execution. This vulnerability affects Firefox < 129, Firefox ESR < 128.1, and Thunderbird < 128.1.

Is your site exposed to CVE-2024-7520?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-843 CWE-843
CWE-94 CWE-94

Affected Products

Vendor Product
mozilla firefox
mozilla firefox_esr
mozilla thunderbird

References

Frequently Asked Questions

What is CVE-2024-7520? +
A type confusion bug in WebAssembly could be leveraged by an attacker to potentially achieve code execution. This vulnerability affects Firefox < 129, Firefox ESR < 128.1, and Thunderbird < 128.1. It has a CVSS v3.1 base score of 8.8 (HIGH).
How severe is CVE-2024-7520? +
CVE-2024-7520 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2024-7520? +
CVE-2024-7520 affects products from mozilla, specifically: firefox, firefox_esr, thunderbird. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-7520? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-8358

LibreOffice Calc can import tracked changes from a spreadsheet document. A heap buffer overflow existed when a document reused the …
CVE-2026-6210

A type confusion vulnerability in Qt SVG allows an attacker to cause an application crash via a crafted SVG image. …
CVE-2026-61674

Fluent Bit is a fast and lightweight logs, metrics, and traces processor for Linux, BSD, macOS, and Windows. From 0.11.0 …
CVE-2026-101912

ip-address is a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript. Prior to 10.7.1, the isInSubnet and …
CVE-2026-6047

LibreOffice can import documents in the OOXML format (DOCX). A heap buffer overflow existed when replaying deferred parser events for …
CVE-2026-19315

A type confusion vulnerability in the iked process of WatchGuard Fireware OS allows a remote unauthenticated attacker to execute arbitrary …

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2024-7520 — free, no signup required.