CVE-2019-13956: Codersclub Discuz!ml

Critical severity, CVSS 9.8. EPSS: 4.6% chance of exploitation in the next 30 days.

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=en'.phpinfo().'; (if the random prefix 4gH4_0df5_ were used).

Affected products

• Codersclub Discuz!ml: from 3.2, up to and including 3.4

Published 2019-07-18. Last modified 2026-06-17.