CVE-2025-10534
Spoofing issue in the Site Permissions component
HIGH
8.1
CVSS Score
Published: September 16, 2025 at 12:26 PM UTC
Updated: October 18, 2026 at 09:10 PM UTC
2 products affected across 1 vendorFirefoxThunderbird
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Severity
HIGH8.1
Exploit prediction
EPSS 0.4%
SSVC
No known exploit
Description
This vulnerability affects Firefox < 143 and Thunderbird < 143.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (3)
SSVC — Action Prioritization
SSVCNo known exploitNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
8.1HIGHCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-79
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