Description: 1. I discovered a bug in Telegram where users can modify message timestamps by changing the system date and time on their PC. This allows users to send messages with altered times and dates, creating the impression that they were sent at a different time than they actually were. Additionally, this lets users add new messages with manipulated timestamps, causing confusion in the chat history.
2. Replace previous messages with new ones, which appear in the original message's place without an "Edited" indicator, creating a seamless modification of the chat history.
Steps to reproduce
Steps to Reproduce:
Open Telegram on a PC.
Change the system date and time on the PC to a desired date and time.
Send a message in any chat on Telegram.
For manipulation:
Delete an older message.Send a new message while keeping the system date and time set to the original message’s timestamp.Observe that the message appears with the altered date and time, as set on the PC.
Device info
Telegram Desktop 5.7 x64, HP Laptop 15s-eq2xxx, Windows 11 x64
Log in here to report bugs or suggest features. Please enter your phone number in the international format and we will send a confirmation message to your account via Telegram.