CVE-2018-1000820 json
XML External Entity (XXE) vulnerability in neo4j.procedure:apoc
published 2018-12-20 7 y ago modified 2026-06-17 4 mo ago also GHSA-r2pp-x4mm-4999 , EUVD-2018-0819
- cvss
- 10.0
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.9%
- EPSS 1.9% chance of exploitation in 30 days, percentile 79%
- public exploits
- 0
- none known
Summary
neo4j-contrib neo4j-apoc-procedures version before commit 45bc09c contains a XML External Entity (XXE) vulnerability in XML Parser that can result in Disclosure of confidential data, denial of service, SSRF, port scanning. This vulnerability appears to have been fixed in after commit 45bc09c.
Patch / fix
- maven org.neo4j.procedure:apoc 3.4.0.4
Exploit prediction
1.87% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 10.0 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| GitHub | 3.0 | 10.0 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.neo4j.procedure:apoc | <3.4.0.4 |
3.4.0.4 |
Classification
- Weakness
-
- CWE-611 Improper Restriction of XML External Entity Reference
References
-
github.com
/neo4j-contrib/neo4j-apoc-procedures/issues/931
web, issue-tracking, patch, third-party-advisory
-
0dd.zone
/2018/10/27/neo4f-apoc-procedures-XXE/
third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2018-1000820
advisory
-
0dd.zone
/2018/10/27/neo4f-apoc-procedures-XXE
web
Sources
- CVE List CVE-2018-1000820
- GitHub Advisory GHSA-r2pp-x4mm-4999
- NVD CVE-2018-1000820
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.