CVE-2021-23463

Name: CVE-2021-23463
Creator: NVD / NIST
Published: 2021-12-10T20:15:07.917+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 3.28%

Last modified Jun 17, 2026

CVE-2021-23463 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 3.28% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS Probability

3.28%

86.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-611

Affected Software

Vendor	Product	Versions
H2database	H2	>= 1.4.198, < 2.0.202

References

https://github.com/h2database/h2database/commit/d83285fd2e48fb075780ee95badee6f5a15ea7f8%23diff-008c2e4462609982199cd83e7cf6f1d6b41296b516783f6752c44b9f15dc7bc3Broken Link
https://github.com/h2database/h2database/issues/3195Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/h2database/h2database/pull/3199Issue Tracking, Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20230818-0010/
https://snyk.io/vuln/SNYK-JAVA-COMH2DATABASE-1769238Exploit, Patch, Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlNot Applicable
https://github.com/h2database/h2database/commit/d83285fd2e48fb075780ee95badee6f5a15ea7f8%23diff-008c2e4462609982199cd83e7cf6f1d6b41296b516783f6752c44b9f15dc7bc3Broken Link
https://github.com/h2database/h2database/issues/3195Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/h2database/h2database/pull/3199Issue Tracking, Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20230818-0010/
https://snyk.io/vuln/SNYK-JAVA-COMH2DATABASE-1769238Exploit, Patch, Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlNot Applicable

Timeline

Published: Dec 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-23463?

How severe is CVE-2021-23463?

CVE-2021-23463 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 3.28% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23463?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-23463?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST