Media ContentProvider URIs used for opening attachments in other apps were generated sequentially prior to WhatsApp for Android v2.20.185, which could have allowed a malicious third party app chosen to open the file to guess the URIs for previously opened attachments until the opener app is terminated.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-1905
Reference (s):
- https://www.whatsapp.com/security/advisories/2020/
- URL: https://www.whatsapp.com/security/advisories/2020/