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CVE-2018-20318

32
FAUCET Score

CVE-2018-20318 is a critical XML External Entity (XXE) vulnerability found in the getXmlDoc method of the BaseWxPayResult.java file within weixin-java-tools v3.2.0. This flaw allows an unauthenticated attacker to remotely execute arbitrary code, access sensitive data, or cause denial of service with low attack complexity. With a CVSS score of 9.8 (CRITICAL), it poses a significant risk due to its potential for complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered considerable community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
3.2.0CPE matchmatch criteria
cpe:2.3:a:wxjava_project:wxjava:3.2.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.66%
Probability of exploitation in next 30 days
EPSS Percentile
74.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0166 is in the 62nd percentile among its peer group of 36,821 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / Wechat-Group/weixin-java-tools/issues/889
ExploitThird Party Advisory