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No exploitation reportedFix available

CVE-2021-23463

No exploitation reported by the sources we read.

  • Published2021-12-10
  • Fixed in2.0.202
  • WeaknessCWE-611

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The package com.h2database:h2 from 1.4.198 and before 2.0.202 are vulnerable to XML External Entity (XXE) Injection via the org.h2.jdbc.JdbcSQLXML class object, when it receives parsed string data from org.h2.jdbc.JdbcResultSet.getSQLXML() method. If it executes the getSource() method when the parameter is DOMSource.class it will trigger the vulnerability.

Timeline

dates in UTC
  1. 2021-12-1020:15CVE publishedNVD

Versions per branch

NVD · OSV
H2database h2
BranchAffectedFixed in
2.0≥ 1.4.198, < 2.0.2022.0.202

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • com.h2database:h2TuxCare:Mavenfrom 1.4.200 · fixed in 1.4.200-tuxcare.1

Vendor advisories

  • CVE-2021-23463 Red Hat Product Security3 known affected

    h2database: XXE injection vulnerability

    com.h2database.h2 as a component of Red Hat build of Apicurio Registry 2 · com.h2database.h2 as a component of Red Hat build of Quarkus · com.h2database.h2 as a component of Red Hat Integration Service Registry

Full record on NVD

Fix

  1. Update H2database h2 to 2.0.202
  2. No fix available, says the vendor Red Hat Product Security CVE-2021-23463 · 2 productsAffected
  3. No fix planned, says the vendor Red Hat Product Security CVE-2021-23463 · 1 productOut of support scope

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.18.1known since 2026-10-23
  • NVDCVSS 3.19.1read 2026-10-23
  • NVDCVSS 2.06.4read 2026-10-23
  • NVDweakness (CWE)CWE-611read 2026-10-23
  • FIRST EPSSEPSS score2.8 %2026-11-09
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2021-12-14

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Published
2021-12-10
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-7rpj-hg47-cx62

Frequently asked questions

What is CVE-2021-23463?

The package com.h2database:h2 from 1.4.198 and before 2.0.202 are vulnerable to XML External Entity (XXE) Injection via the org.h2.jdbc.JdbcSQLXML class object, when it receives parsed string data from org.h2.jdbc.JdbcResultSet.getSQLXML() method. If it executes the getSource() method when the parameter is DOMSource.class it will trigger the vulnerability.

Is CVE-2021-23463 actively exploited?

Active exploitation of CVE-2021-23463 has not been confirmed. Its EPSS score was 2.8% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-23463?

CVE-2021-23463 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

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