Security Digest · Vulnerability record · Known exploited
CVE-2024-9680: Mozilla Firefox Use-After-Free Vulnerability
Exploited in the wild (CISA KEV). An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines.
CISA KEV · added 2024-10-15 CVSS 9.8 Critical EPSS 23.2% · p98
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run Mozilla Firefox. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2024-10-15, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2024-11-05; treat that as the outer limit, not the target. CISA also lists it as known to be used in ransomware campaigns.
- EPSS 23.2%, percentile 98: FIRST’s model estimates a 23.2% chance of exploitation activity in the next 30 days, higher than 98% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
What it is
An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines. We have had reports of this vulnerability being exploited in the wild. This vulnerability affects Firefox
CISA’s summary
Mozilla Firefox and Firefox ESR contain a use-after-free vulnerability in Animation timelines that allows for code execution in the content process.
Weakness type: CWE-416.
Product: Mozilla Firefox · Assigned by: mozilla · Published: 2024-10-09
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Mozilla | Firefox | unspecified < 131.0.2 |
| Mozilla | Firefox ESR | unspecified < 128.3.1 |
| Mozilla | Firefox ESR | unspecified < 115.16.1 |
| Mozilla | Thunderbird | unspecified < 131.0.1 |
| Mozilla | Thunderbird | unspecified < 128.3.1 |
| Mozilla | Thunderbird | unspecified < 115.16.0 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2024-10-15; federal due date 2024-11-05. Known ransomware use: Known.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 23.18% probability of exploitation activity in the next 30 days; percentile 98.
Timeline
- — CVE record published by mozilla
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (mozilla.org) mozilla.org
Vulnerability records
- CVE.org record CVE-2024-9680 cve.org
- NVD entry CVE-2024-9680 nvd.nist.gov
Government
Other references from the CVE record and advisory
- bugzilla.mozilla.org bugzilla.mozilla.org
- Windows sandbox escape detected with the in-the-wild exploit msrc.microsoft.com
- mozilla.org mozilla.org
- mozilla.org mozilla.org
- bugs.freebsd.org bugs.freebsd.org
- lists.debian.org lists.debian.org
- lists.debian.org lists.debian.org
All exploited Mozilla vulnerabilities · Today’s Security Digest