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CVE-2018-1000820

30
FAUCET Score

CVE-2018-1000820 is a critical XML External Entity (XXE) vulnerability affecting neo4j-contrib neo4j-apoc-procedures versions prior to commit 45bc09c. This flaw in the XML Parser can lead to severe consequences including disclosure of confidential data, denial of service, Server-Side Request Forgery (SSRF), and port scanning. With a CVSS score of 10.0 (CRITICAL), this vulnerability is easily exploitable over the network with low attack complexity and no user interaction required, potentially impacting confidentiality, integrity, and availability. The FAUCET Risk Score is 80/100, indicating high risk. There is currently no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) or KEV entry exists. Community discussion and media coverage are minimal, suggesting low public awareness despite its critical severity.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:neo4j:awesome_procedures_on_cyper:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

10.0CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.87%
Probability of exploitation in next 30 days
EPSS Percentile
77.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-23
Model: v2026.06.15
This CVE's current EPSS score of 0.0187 is in the 66th 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

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: org.neo4j.procedure:apocFixed in: 3.4.0.4

Vendor Advisories (1)

mavenGHSA-r2pp-x4mm-4999critical

XML External Entity (XXE) vulnerability in neo4j.procedure:apoc

Dec 20, 2018

References

0dd.zone / 2018/10/27/neo4f-apoc-procedures-XXE
Third Party Advisory
github.com / neo4j-contrib/neo4j-apoc-procedures/issues/931
Issue TrackingPatchThird Party Advisory