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Mastodon.cloud is an insecure and abandoned platform that runs outdated software with known security vulnerabilities.

GeneralApr 18, 2026score 1.723 posts · 132 replies across 2 instances
Multiple posts from the same user warn about the security risks and abandonment of Mastodon.cloud, noting outdated software, known vulnerabilities, and de-federation from the Fediverse. The posts urge users to migrate to alternative platforms.

Claims

Mastodon.cloud is an insecure and abandoned platform that runs outdated software with known security vulnerabilities.
Parent: FediverseEntity: Mastodon.cloudImpact: negativeDate: Apr 18, 2026 - Apr 19, 2026Target: Mastodon.cloud's security and operational status
Mastodon.cloud is being de-federated, which will prevent future communication with other Mastodon and Misskey sites.
Parent: FediverseEntity: Mastodon.cloudImpact: negativeDate: Apr 18, 2026 - Apr 19, 2026Target: Mastodon.cloud's connectivity within the Fediverse

Source posts

@[email protected]
This site, Mastodon.cloud, is not secure. It has been abandoned and is currently running outdated software with a known security vulnerability. Please migrate to an alternative site. Mastodon.cloud is also being de-federated, meaning it is being disconnected from the rest of the Fediverse. In the future, other Mastodon and Misskey sites will no longer communicate with Mastodon.cloud. Details concerning this version of Mastodon 4.1.25. https://github.com/mastodon/mastodon/releases/tag/v4.1.25 #Mastodon #Misskey #Fediverse
5 boosts · 1 favs · 0 replies · Apr 19, 2026
#mastodon#misskey#fediverse
@[email protected]
This site, Mastodon.cloud, is not secure. It has been abandoned and is currently running outdated software with a known security vulnerability. Please migrate to an alternative site. Mastodon.cloud is also being de-federated, meaning it is being disconnected from the rest of the Fediverse. In the future, other Mastodon and Misskey sites will no longer communicate with Mastodon.cloud. Details concerning this version of Mastodon 4.1.25. https://github.com/mastodon/mastodon/releases/tag/v4.1.25 #Mastdon #Misskey #Fediverse
22 boosts · 0 favs · 4 replies · Apr 18, 2026
#mastdon#misskey#fediverse
@[email protected]
This site, Mastodon.cloud, is not secure. It has been abandoned and is currently running outdated software with a known security vulnerability. Please migrate to an alternative site. Mastodon.cloud is also being de-federated, meaning it is being disconnected from the rest of the Fediverse. In the future, other Mastodon and Misskey sites will no longer communicate with Mastodon.cloud. Details concerning this version of Mastodon 4.1.25. https://github.com/mastodon/mastodon/releases/tag/v4.1.25 #Mastodon #Misskey #Fediverse
1 boosts · 0 favs · 0 replies · Apr 18, 2026
#mastodon#misskey#fediverse
@[email protected]
This site, Mastodon.cloud, is not secure. It has been abandoned and is currently running outdated software with a known security vulnerability. Please migrate to an alternative site. Mastodon.cloud is also being de-federated, meaning it is being disconnected from the rest of the Fediverse. In the future, other Mastodon and Misskey sites will no longer communicate with Mastodon.cloud. Details concerning this version of Mastodon 4.1.25. https://github.com/mastodon/mastodon/releases/tag/v4.1.25 #Mastdon #Misskey #Fediverse
1 boosts · 0 favs · 0 replies · Apr 18, 2026
#mastdon#misskey#fediverse
@[email protected]
This site, Mastodon.cloud, is not secure. It has been abandoned and is currently running outdated software with a known security vulnerability. Please migrate to an alternative site. Mastodon.cloud is also being de-federated, meaning it is being disconnected from the rest of the Fediverse. In the future, other Mastodon and Misskey sites will no longer communicate with Mastodon.cloud. Details concerning this version of Mastodon 4.1.25. https://github.com/mastodon/mastodon/releases/tag/v4.1.25 #Mastodon #Misskey #Fediverse
1 boosts · 0 favs · 0 replies · Apr 19, 2026
#mastodon#misskey#fediverse