CVE-2018-20433

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 4.6%, top 9% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 5%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation5% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
90.7%
KEV
Not listed

Published

December 24, 2018

Last Modified

November 21, 2024

Advisory Details (4)

Auto-updated Jun 7, 2026
Patch available. Sources: github_commit.
generic

[SECURITY] Fedora 29 Update: c3p0-0.9.5.4-1.fc29 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MQ47OFV57Y2DAHMGA5H3JOL4WHRWRFN4/
generic

[SECURITY] Fedora 30 Update: c3p0-0.9.5.4-1.fc30 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BFIVX6HOVNLAM7W3SUAMHYRNLCVQSAWR/
generic Patch Available

[SECURITY] [DLA 1621-1] c3p0 security update

https://lists.debian.org/debian-lts-announce/2018/12/msg00021.html
github_commit

commit 2eb0ea97f745 (zhutougg/c3p0)

Fix landed in zhutougg/c3p0 commit 2eb0ea97f745 — awaiting tagged release

https://github.com/zhutougg/c3p0/commit/2eb0ea97f745740b18dd45e4a909112d4685f87b

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
com.mchange:c3p00.9.2 ... 0.9.5.2 (22 versions)0.9.5.3—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 01:35 UTCEG score recompute
  2. 2026-07-22 22:15 UTCEG score recompute
  3. 2026-07-22 14:05 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
  5. 2026-07-21 00:47 UTCOSV refresh
  6. 2026-07-20 17:04 UTCEPSS rescore
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  1. 2026-07-06 16:24 UTCEPSS rescore
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  7. 2026-07-03 20:26 UTCOSV refresh
  8. 2026-07-02 16:54 UTCEPSS rescore
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  30. 2026-06-19 19:23 UTCEPSS rescore
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  39. 2026-06-15 08:13 UTCOSV refresh
  40. 2026-06-14 23:15 UTCEPSS rescore
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  42. 2026-06-13 22:58 UTCEPSS rescore
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  45. 2026-06-11 13:57 UTCEPSS rescore
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  50. 2026-06-07 15:22 UTCEPSS rescore
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  52. 2026-06-06 13:45 UTCEPSS rescore
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  69. 2026-05-27 23:59 UTCEG score recompute
  70. 2026-05-27 13:38 UTCEPSS rescore
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  74. 2026-05-26 07:17 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2018-20433?
CVE-2018-20433 is a critical vulnerability published on December 24, 2018. c3p0 0.9.5.2 allows XXE in extractXmlConfigFromInputStream in com/mchange/v2/c3p0/cfg/C3P0ConfigXmlUtils.java during initialization.
When was CVE-2018-20433 disclosed?
CVE-2018-20433 was first published in the National Vulnerability Database on December 24, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-20433 actively exploited?
CVE-2018-20433 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-20433?
CVE-2018-20433 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2018-20433?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-20433, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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