What is CVE-2018-20424?

CVE-2018-20424 is a medium-severity vulnerability in Comsenz Discuzx, classified under Improper Input Validation. CVSS score: 5.9/10. Published 2018-12-24.

How severe is CVE-2018-20424?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Improper input validation in Comsenz Discuzx

CVE-2018-20424

Discuz! DiscuzX 3.4, when WeChat login is enabled, allows remote attackers to delete the common_member_wechatmp data structure via an ac=unbindmp request to plugin.php.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-12-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.009 (58.3th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Comsenz Discuzx — versions x3.4

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

gitee.com/ComsenzDiscuz/DiscuzX/issues/IPRUI (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2018-20424?: CVE-2018-20424 is a medium-severity vulnerability in Comsenz Discuzx, classified under Improper Input Validation. CVSS score: 5.9/10. Published 2018-12-24.
How severe is CVE-2018-20424?: Medium severity. CVSS v3 base score is 5.9 out of 10.