CVE-2018-20423

CVE-2018-20423 is a high-severity vulnerability in Comsenz Discuzx with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Discuz! DiscuzX 3.4, when WeChat login is enabled, allows remote attackers to bypass a "disabled registration" setting by adding a non-existing wxopenid value to the plugin.php ac=wxregister query string.

Frequently asked questions

What is CVE-2018-20423?
Discuz! DiscuzX 3.4, when WeChat login is enabled, allows remote attackers to bypass a "disabled registration" setting by adding a non-existing wxopenid value to the plugin.php ac=wxregister query string.
How severe is CVE-2018-20423?
CVE-2018-20423 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-20423 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20423?
CVE-2018-20423 affects Comsenz Discuzx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20423?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-20423 published?
CVE-2018-20423 was published on 2018-12-24 and last updated on 2026-06-17.

References

Affected products (1)

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