→ Just to update this thread: →
Tails 5.1 has been released:
Tails 5.1 Has Been Released! (2022-06-04)
Disregard the following (since 5.1 has been released) text, retaining it here for historical value.
"Tor Browser in Tails 5.0 and earlier is unsafe to use for sensitive information.
We recommend that you stop using Tails until the release of 5.1 (May 31) if you use Tor Browser for sensitive information (passwords, private messages, personal information, etc.).
This vulnerability allows a malicious website to bypass some of the security built in Tor Browser and access information from other websites.
For example, after you visit a malicious website, an attacker controlling this website might access the password or other sensitive information that you send to other websites afterwards during the same Tails session.
This vulnerability doesn’t break the anonymity and encryption of Tor connections.
For example, it is still safe and anonymous to access websites from Tails if you don’t share sensitive information with them.
After Tor Browser has been compromised, the only reliable solution is to restart Tails.
This vulnerability will be fixed in Tails 5.1 (May 31), but our team doesn’t have the capacity to publish an emergency release earlier."
- Discovered this information at: Serious security vulnerability in Tails 5.0: Tor Browser in Tails 5.0 and earlier is unsafe to use for sensitive information. : tails
Edit: Removed text which was later removed from the first link’s destination above to match