9.8

CVE-2024-7521: mozilla firefox

CVSS: 9.8v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2024-7521DEBIAN-CVE-2024-7521CGA-7f97-mc9m-pr8c
Published 06-08-2024Last modified 07-08-2024
Open JSON

Vulnerability summary

CVE-2024-7521 is a critical (CVSS 9.8) vulnerability in mozilla firefox. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 48.5% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.62%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 31 · Related 12
DSA-5740-1DSA-5744-1MGASA-2024-0325MGASA-2024-0332MGASA-2024-0334OPENSUSE-SU-2024:14250-1

Timeline

  1. 06-08-2024
    PublishedVulnerability first disclosed.
  2. 07-08-2024
    Last modifiedVulnerability information updated.

Description

Incomplete WebAssembly exception handing could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, Firefox ESR < 128.1, Thunderbird < 128.1, and Thunderbird < 115.14.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.62%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

0.00 pp

From 0.62% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.62%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu9 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, < 115.14 | ≥ unspecified, < 128.1 | < 115.14.0 | 128.0
  • thunderbird≥ unspecified, < 128.1 | ≥ unspecified, < 115.14 | < 115.14.0 | 128.0.1
Chainguard2 products
  • firefox< 129.0.2-r0
  • firefox-esr< 128.1.0-r0
Debian2 products
  • firefox-esr< 115.14.0esr-1~deb12u1 | < 115.14.0esr-1
  • thunderbird< 1:115.14.0-1~deb12u1 | < 1:128.1.0esr-1
Wolfi1 product
  • firefox< 129.0.2-r0

5 vendors · 17 products

References

13 links
Show all 13 references