OPAccountProvider

OnePlus 13R Preinstalled Account App Leaks Cloud Session Tokens to Any App Declaring Required Permission

Researchers at Doyensec identified a vulnerability in the preinstalled com.oneplus.account application on the OnePlus 13R that allows any third-party app to steal a valid OnePlus Cloud session token. The flaw stems from the OPAccountProvider component lacking the protectionLevel="signature" attribute on its declared permission com.oneplus.account.READ_ACCOUNT_INFO, enabling any app to request the permission and query the provider directly. Once obtained, the token grants access to OnePlus Cloud APIs without further user interaction or warnings. Doyensec responsibly disclosed the issue on 30 December 2025, leading OnePlus to acknowledge the high-severity problem and pay a $720 bounty in March 2026. Follow-up testing in September on firmware CPH2691_16.0.10.500(EX01) confirmed the token leakage persists, although full account takeover via the regional API was no longer reproducible for US and EMEA accounts due to backend changes. Users are advised to avoid untrusted apps and apply future updates, while OnePlus needs only to add the signature protection level to close the exposure.