CVE-2024-7520: mozilla firefox Type Confusion
CVSS: 8.8v3.1HighModified
AliasesUBUNTU-CVE-2024-7520CGA-5w22-7php-c7jgCGA-fgpp-73qc-hgmrCGA-g286-7cv2-c6q2CGA-j4cv-jpqc-cm2c
Published 06-08-2024Last modified 24-03-2025
Vulnerability summary
CVE-2024-7520 is a high (CVSS 8.8) Type Confusion vulnerability in mozilla firefox. EPSS estimates a 0.64% chance of exploitation in the next 30 days, higher than 49.6% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (CVE.org)EPSS score
0.64%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 26 · Related 9MGASA-2024-0325MGASA-2024-0332MGASA-2024-0334OPENSUSE-SU-2024:14260-1OPENSUSE-SU-2024:14572-1RHSA-2024:5322RHSA-2024:5323RHSA-2024:5324RHSA-2024:5325RHSA-2024:5326RHSA-2024:5327RHSA-2024:5328RHSA-2024:5329RHSA-2024:5391RHSA-2024:5392RHSA-2024:5393RHSA-2024:5394RHSA-2024:5395RHSA-2024:5396RHSA-2024:5402RHSA-2024:5527RHSA-2024:5528SUSE-SU-2024:2876-1SUSE-SU-2024:3003-1SUSE-SU-2024:3507-1USN-6966-1CGA-8XVC-5X63-P92HCGA-VXHW-37HM-9QG9CGA-VXRQ-HG6W-C32Q
Timeline
- 06-08-2024PublishedVulnerability first disclosed.
- 24-03-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 5 sources · 1 versionHigh 8.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSourcesAll 5 agree
- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · WolfiEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · ChainguardEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.64%
Chance of exploitation in the next 30 days
Percentile
50%
Versus all other CVEs
30-day change
0.00 pp
From 0.64% on 20-09-2026
20-09-202620-10-2026
EPSS score0.64%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-843Access of Resource Using Incompatible Type ('Type Confusion')The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
- CWE-94Improper Control of Generation of Code ('Code Injection')The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
Affected systems
Ubuntu8 products
- firefox< 129.0.1+build1-0ubuntu0.20.04.1
- mozjs102All versions (No fix recorded)
- mozjs115All versions (No fix recorded)
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
Mozilla3 products
- firefox≥ unspecified, < 129 | < 129.0
- firefox_esr≥ unspecified, < 128.1 | < 128.1.0
- thunderbird≥ unspecified, < 128.1 | < 128.1.0
Chainguard2 products
- firefox< 129.0.2-r0
- firefox-esr< 128.1.0-r0
Wolfi1 product
- firefox< 129.0.2-r0
4 vendors · 14 products