Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2024-9680

Firefox

Mozilla / Firefox · affected before 131.0.2

Watch CVE-2024-9680 Browse KEV feed
Severity
CVSS 9.8 · Critical
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
23.2%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2024-9680 is an unauthenticated vulnerability affecting Mozilla Firefox and 2 other products. An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV. Also confirmed by third-party sources.

Who is affected?

Mozilla / Firefox affected before 131.0.2.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Firefox

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 < 131.0.2, Firefox ESR < 128.3.1, Firefox ESR < 115.16.1, Thunderbird < 131.0.1, Thunderbird < 128.3.1, and Thunderbird < 115.16.0.

mozilla Affected
firefox
Before 131.0.2
mozilla Affected
firefox_esr
Before 128.3.1 Before 115.16.1
mozilla Affected
thunderbird
Before 131.0.1 Before 128.3.1 Before 115.16.0
Mozilla Affected
Firefox
Before 131.0.2
Mozilla Affected
Firefox ESR
Before 128.3.1 Before 115.16.1
Mozilla Affected
Thunderbird
Before 131.0.1 Before 128.3.1 Before 115.16.0
Published
09 Oct 2024
Exploitation Reported
15 Oct 2024
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

cisa nessus_scanner malware

CVE References

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 15 Oct 2024

A trusted third party reported exploitation.

Used in malware

CISA

Recorded 02 Jun 2026

Malware families have been linked to exploitation of this CVE.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

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Source Added
CISA First 2024-10-15 00:00 UTC
CVE 2026-08-04 04:41 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nessus https://www.tenable.com/plugins/nessus/212185 02 Jun 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

9.8 Critical

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

23.2%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Use After Free CWE-416

Recent mention · Google Threat Intelligence

Written by: Casey Charrier, James Sadowski, Clement Lecigne, Vlad Stolyarov Executive Summary Google Threat Intelligence Group (GTIG) tracked 75...

Written by: Casey Charrier, James Sadowski, Clement Lecigne, Vlad Stolyarov Executive Summary Google Threat Intelligence Group (GTIG) tracked 75 zero-day vulnerabilities exploited in the wild in 2024, a decrease from the number we identified in 2023 (98 vulnerabilities), but...

Read full advisory

Timeline

From disclosure to observed exploitation

  1. 04:41 UTC

    KEV confirmed by CVE

    Exploitation attested by an external source

  2. 14:08 UTC

    First public exploitation report

    Exploit observed in malware

  3. 09:26 UTC

    Nessus plugin available

    Scanner coverage available

  4. 00:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  5. 12:59 UTC

    CVE published

    Vulnerability disclosed publicly

  6. 06:28 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2024-9680

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2024-9680",
  "confidence": "Confirmed",
  "cvss_score": 9.8,
  "cvss_estimated": false,
  "epss_score": 0.23184,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}