The README and other documents state:

selfoss was created by Tobias Zeising and it is licensed under the GPLv3 license.

But it is not clear if this was meant to be only version 3 of the license, or also allow later versions of GPL, as strongly recommended by GNU foundation – people often use this phrasing, considering the upgradability obvious.

See also https://gnu.org/licenses/identify-licenses-clearly.html

In order to clear up this uncertainty, we will need the past contributors to confirm if they are fine with licensing their contribution under GPL 3 or later, or remove their contributions.

cc @SSilence @niol

» Checklist of selfoss contributors who agreed with licensing their contributions under GPL 3+ «