The bug
Explosions can damage blocks outside of world border. Seems unintended considering you cannot damage/modify outside of the border in other ways.
Examples
beds exploding in the nether
creeper
fireball
tnt
tnt minecarts
Steps to Reproduce
Set the center of the world border to your current position and to 15 blocks wide.
/worldborder center ~ ~ /worldborder set 15
Place some TNT directly next to the world border and ignite it.
When the TNT explodes, take note as to whether or not explosions can damage blocks and set fires outside of the world border.
Observed Behavior
Explosions can damage blocks and set fires outside of the world border.
Expected Behavior
Explosions would not be able to damage blocks and set fires outside of the world border.
Linked issues
is duplicated by
relates to
Attachments
Comments


Well then the affected version has to get updated...

Confirmed for
15w37a

Confirmed for 1.9

Still in 16w15b

Tested this and it appears to still be an issue for 1.13-pre7
Confirmed for 1.13.1.
Confirmed for 1.15 Pre-Release 3
Confirmed in 1.16-pre5.

Confirmed in 1.16.1.

In 20w29a
Can confirm in 20w48a.
Can confirm in 21w03a.
Can confirm in 21w05b.
Can confirm in 21w06a.
Can confirm in 21w07a. Video attached.
Can confirm in 21w11a. Relates to MC-114002.
Can confirm in 21w17a.
Can confirm in 1.17.

Can confirm in 1.17.1 Pre-release 3.
Can confirm in 1.17.1.

Can confirm in 21w37a.

Can confirm in 21w38a.

Can confirm in 21w40a.

Can confirm in 21w41a.
I am also able to confirm this behavior in 21w41a. Here are some extra details regarding this problem.
The Bug:
Explosions can damage blocks and set fires outside of the world border.
Steps to Reproduce:
Set the center of the world border to your current position and to 15 blocks wide.
/worldborder center ~ ~
/worldborder set 15
Place some TNT directly next to the world border and ignite it.
When the TNT explodes, take note as to whether or not explosions can damage blocks and set fires outside of the world border.
Observed Behavior:
Explosions can damage blocks and set fires outside of the world border.
Expected Behavior:
Explosions would not be able to damage blocks and set fires outside of the world border.

Can confirm in 21w43a.

Still present in 1.18 pre-release 1

Can confirm still in 1.18 Pre-release 1.
Can confirm in 1.18.1.
Can confirm in 1.18.2 and 22w11a.
I wish this would get more attention. Seems pretty significant to me.