Remote Code Execution Vulnerability in Firefox by Mozilla
CVE-2025-10531

5.4MEDIUM

Key Information:

Vendor

Mozilla
Status
Firefox
Thunderbird
Vendor
CVE Published:
16 September 2025

What is CVE-2025-10531?

A security vulnerability has been identified in Firefox versions prior to 143, which may allow attackers to execute arbitrary code on the affected systems, potentially leading to unauthorized actions. Users are encouraged to update to the latest version to ensure their systems remain secure.

Affected Version(s)

Firefox < 143

Thunderbird < 143

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1978453
https://www.mozilla.org/security/advisories/mfsa2025-73/
https://www.mozilla.org/security/advisories/mfsa2025-77/

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Nikolaos Mourousias
JSON
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CVE-2025-10531 : Remote Code Execution Vulnerability in Firefox by Mozilla