XSLT Document Loading Vulnerability in Firefox and Thunderbird
CVE-2025-8032

8.1HIGH

Key Information:

Vendor

Mozilla
Status
Firefox
Firefox Esr
Thunderbird
Vendor
CVE Published:
22 July 2025

What is CVE-2025-8032?

This vulnerability in Firefox and Thunderbird arises from improper propagation of the source document during XSLT document loading. As a result, the Content Security Policy (CSP) is bypassed, potentially allowing malicious scripts to execute undetected. Affected versions of Firefox and Thunderbird may expose users to various cybersecurity risks, making it crucial for users to update their applications promptly.

Affected Version(s)

Firefox < 141

Firefox ESR < 128.13

Firefox ESR < 140.1

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1974407
https://www.mozilla.org/security/advisories/mfsa2025-56/
https://www.mozilla.org/security/advisories/mfsa2025-58/

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Joe Turki
.