CVE-2019-13956
Discuz!ML 3.2 through 3.4 allows remote attackers to execute arbitrary PHP code via a modified language cookie, as demonstrated by changing 4gH4_0df5_language=en to 4gH4_0df5_language=enβ.phpinfo().β; (if the random prefix 4gH4_0df5_ were used).
Source: CVE-2019-13956