Ref# ADV2025_285 | Date: Aug 20th 2025

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Mozilla has published a security advisory highlighting vulnerabilities in the following products on August 19th, 2025. It is recommended that you take the necessary precautions by ensuring your products are always updated. 

• Focus for iOS – versions prior to 142 
• Firefox for iOS – versions prior to 142 
• Firefox ESR – versions prior to 140.2 
• Firefox ESR – versions prior to 128.14 
• Firefox ESR – versions prior to 115.27 
• Firefox – versions prior to 142 

For more information on these updates, you can follow this URL: 

Mozilla Security Advisories 

The Guyana National CIRT recommends that users and administrators review these updates and apply them where necessary. 

PDF Download: Mozilla Security Advisory

References 

• Mozilla Security Advisories. (August 19th, 2025). Retrieved from Mozilla. https://www.mozilla.org/en-US/security/advisories/  

• Mozilla Security Advisory. (August 19th, 2025). Retrieved from Canadian Centre for Cyber Security. https://www.cyber.gc.ca/en/alerts-advisories/mozilla-security-advisory-av25-529