emqx4.3/changes/ce/fix-10172.zh.md

修复错误的默认 ACL 规则，之前是：

{allow, {username, "^dashboard?"}, subscribe, ["$SYS/#"]}.

但执行正则表达式的匹配应该使用 {re, "^dashboard$"}：

{allow, {username, {re, "^dashboard$"}}, subscribe, ["$SYS/#"]}.