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CVE-2018-20422

25
FAUCET Score

CVE-2018-20422 is an authentication bypass vulnerability affecting Discuz! DiscuzX 3.4 when WeChat login is enabled, allowing remote attackers to gain unauthorized access to user accounts. This high-severity vulnerability (CVSS 8.1) has a complex attack vector but requires no user interaction, potentially leading to full compromise of confidentiality, integrity, and availability. While no active exploitation, public exploit code, or significant community discussion has been observed, its high CVSS score and FAUCET Risk Score of 62/100 indicate a notable risk.

Impacted Technologies

VendorProductVersion(s)CPE
x3.4CPE matchmatch criteria
cpe:2.3:a:comsenz:discuzx:x3.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.29%
Probability of exploitation in next 30 days
EPSS Percentile
67.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0129 is in the 27th percentile among its peer group of 8,914 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

gitee.com / ComsenzDiscuz/DiscuzX/issues/IPRUI
ExploitIssue TrackingThird Party Advisory