# MA-1167.102024: MyCERT Advisory - Mozilla Firefox -Zero-day Actively Exploited Vulnerability

**Date:** 11 Oct 2024  
**Source:** https://www.mycert.org.my/portal/advisory?id=MA-1167.102024  
**Advisory ID:** MA-1167.102024

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**1.0 Introduction**
Recently, Mozilla has released an emergency security update to address a critical vulnerability (CVE-2024-9680: Use-after-free in Animation Timelines) in the Firefox browser, which is currently being exploited in the wild.
**2.0 Impact**
This vulnerability, identified as a use-after-free flaw in Animation timelines, poses a significant risk as it allows malicious actors to execute arbitrary code.
**3.0 Affected Products**
- Firefox versions prior to 131.0.2
- Firefox ESR versions prior to 128.3.1
- Firefox ESR versions prior to 115.16.1
**4.0 Recommendations**
CyberSecurity Malaysia encourages users and administrators to review [Mozilla’s security advisories](https://www.mozilla.org/en-US/security/advisories/) for more information and apply the necessary updates.
Kindly refer to the following URLs for more information:
- <https://www.mozilla.org/en-US/security/advisories/mfsa2024-51/>
Generally, Cyber999 advises the users of these devices to be updated with the latest security announcements by the vendor and follow best practice security policies to determine which updates should be applied.
For further enquiries, please contact us through the following channels:
E-mail: cyber999[at]cybersecurity.my 
Phone: 1-300-88-2999 (monitored during business hours) 
Mobile: +60 19 2665850 (24x7 call incident reporting) 
Business Hours: Mon - Fri 08:30 -17:30 MYT 
Web: [https://www.mycert.org.my](https://www.mycert.org.my/)
**5.0 References**
- <https://www.mozilla.org/en-US/security/advisories/mfsa2024-51/>