CVE-2025-3522 | Mozilla Thunderbird up to 128.9.1/137.0.1 Header X-Mozilla-External-Attachment-URL information disclosure
A vulnerability, which was classified as problematic, was found in Mozilla Thunderbird up to 128.9.1/137.0.1. This affects an unknown part of the component Header Handler. The manipulation of the argument X-Mozilla-External-Attachment-URL leads to information disclosure.
This vulnerability is uniquely identified as CVE-2025-3522. It is possible to initiate the attack remotely. There is no exploit available.
It is recommended to upgrade the affected component.