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CVE-2018-20433 mchange c3p0

Affected softwaremchange c3p0
Severity9.8 Critical CVSS 3.0 2 scores
Fixed in0.9.5.3
WeaknessXML external entity (XXE) (CWE-611)
Published24 Dec 2018
Updated17 Jun 2026

Description

c3p0 0.9.5.2 allows XXE in extractXmlConfigFromInputStream in com/mchange/v2/c3p0/cfg/C3P0ConfigXmlUtils.java during initialization.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. The 1 repository below are public GitHub repositories with fewer than 5 stars.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC 1 indexed, none at 5+ stars
  • EPSS 4.6% chance in 30 days

1 of these are GitHub repositories with fewer than 5 stars. They are listed for reference and don't count toward the exploitation status above.

IndexArtifactStarsFirst seen
GitHub PoC version between CVE-2018-20433 and CVE-2019-5427 2020-12-13

Waratek protection

Protected by Waratek

Waratek has a rule that blocks attacks on this vulnerability.

  • Protection full
  • Action available security rule
  • Review human Researcher
  • Record active
Decided by Manual classification of this CVE in the legacy dataset
Finding A manual classification set this CVE's status to Protected by Waratek.

How to mitigate CVE-2018-20433

Upgrade mchange c3p0 to 0.9.5.3 or later. Until you can, Waratek RASP blocks exploitation with a security rule that blocks this kind of attack. It runs inside the Java application, with no code changes.

Waratek RASP Runtime protection for Java applications

CVSS

9.8 CRITICAL v3.0 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.0 9.8 CRITICAL CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H NVD Primary published
CVSS 2.0 7.5 none AV:N/AC:L/Au:N/C:P/I:P/A:P NVD Primary

Affected software and releases

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
com.mchange:c3p0 0 0.9.5.3 unbounded

Products and versions

3 products, 3 version entries
SourceVendorProductSchemeAffected versions
osv com.mchange c3p0 generic < 0.9.5.3
nvd debian debian linux generic 8.0
nvd mchange c3p0 generic 0.9.5.2

References

URLTags
https://github.com/zhutougg/c3p0/commit/2eb0ea97f745740b18dd45e4a909112d4685f87b WEB
https://github.com/advisories/GHSA-q485-j897-qc27 ADVISORY
https://github.com/zhutougg/c3p0 PACKAGE
https://lists.debian.org/debian-lts-announce/2018/12/msg00021.html WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BFIVX6HOVNLAM7W3SUAMHYRNLCVQSAWR WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQ47OFV57Y2DAHMGA5H3JOL4WHRWRFN4 WEB
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BFIVX6HOVNLAM7W3SUAMHYRNLCVQSAWR/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQ47OFV57Y2DAHMGA5H3JOL4WHRWRFN4/

Timeline

Published2018-12-24By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.