UBBCode probes v2 - ignore.
[img]https://example.com/a"onerror="TTODOM5[/img]
[img]https://example.com/a.png"onerror="TTODOM6[/img]
L1
"https://example.com/"onmouseover="TTODOM8"
[img]https://example.com/a.png?x="onerror="TTODOM9[/img]