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by ValentineC 622 days ago
https://wordpress.org/documentation/article/supported-versio...

> The only current officially supported version is the last major release of WordPress. Previous major releases before this may or may not get security updates as serious exploits are discovered.

> …

> Security updates will be backported to older releases when possible, but there are no guarantee and no timeframe for older releases. There are no fixed period of support nor Long Term Support (LTS) version such as Ubuntu’s. None of these are safe to use, except the latest series, which is actively maintained.