Skip to main content

Discuzx CVE-2018-20423

HIGH
2018-12-24 cve@mitre.org
8.1
CVSS 3.0 · NVD
View

Vulnerability Assessment

Impact

CVSS score of 8.1 (HIGH). Attack characteristics: network attack vector, high complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 1.2% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAI

Discuz!. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. Public exploit code available and no vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

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. Affected products include: Comsenz Discuzx.

Know when Discuzx gets its next vulnerability

  • Watch products and get an email when something new is published
  • Check this CVE against your own stack and servers
  • Exploit and PoC references, threat intelligence from 22 sources

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 8.1 HIGH
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

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.

Threat Intelligence Overview

EPSS Score
1.2%
Top 36% exploitable
Exploit
POC
Public exploit code exists
Data Quality
2 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC Yes
EPSS 1.2%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

61
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +40
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)NVD

cpe:2.3:a:comsenz:discuzx:x3.4:*:*:*:*:*:*:*
CVE-2018-20422 HIGH POC
8.1 Dec 24

Discuz!. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. Public

CVE-2024-30884 HIGH POC
7.1 Apr 11

Reflected Cross-Site Scripting (XSS) vulnerability in Discuz!. Rated high severity (CVSS 7.1), this vulnerability is rem

CVE-2018-5376 MEDIUM POC
6.1 Jan 12

Discuz!. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low a

CVE-2018-5375 MEDIUM POC
6.1 Jan 12

Discuz!. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low a

CVE-2018-20424 MEDIUM POC
5.9 Dec 24

Discuz!. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. Publi

CVE-2018-5377 CRITICAL
9.8 Jan 12

Discuz!. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low

CVE-2018-10298 MEDIUM POC
5.4 Apr 22

Discuz!. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exp

CVE-2018-10297 MEDIUM POC
5.4 Apr 22

Discuz!. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exp

CVE-2018-5331 MEDIUM POC
5.4 Jan 10

Discuz!. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exp

CVE-2018-5259 HIGH
8.8 Jan 08

Discuz!. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor pa

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy