CVE-2025-1015: Unsanitized address book fields
The Thunderbird Address Book URI fields contained unsanitized links. This could be used by an attacker to create and export an address book containing a malicious payload in a field. For example, in the “Other” field of the Instant Messaging section. If another user imported the address book, clicking on the link could result in opening a web page inside Thunderbird, and that page could execute (unprivileged) JavaScript.
Affected Software
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2025-1015?
The severity of CVE-2025-1015 is considered high due to the potential for a malicious payload being executed when an address book is imported.
How do I fix CVE-2025-1015?
To fix CVE-2025-1015, upgrade to Thunderbird version 128.8 or later, which addresses the vulnerability.
What type of attacks can exploit CVE-2025-1015?
CVE-2025-1015 can be exploited through crafted address books that contain unsanitized links leading to potential phishing or malware attacks.
Who is affected by CVE-2025-1015?
Users of Mozilla Thunderbird versions up to 128.7 are affected by CVE-2025-1015 and should take immediate action to upgrade.
What should I do if I have already imported an affected address book related to CVE-2025-1015?
If you have imported an affected address book related to CVE-2025-1015, it is recommended to delete the imported contacts and scan your system for potential malware.