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

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-04 · updated 2026-06-17

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.

Affected products

Joomla!: from 3.2.0 before 3.9.25 — fixed in 3.9.25

How to fix

Upgrade to a fixed version: Joomla! 3.9.25. Check the vendor advisory for mitigations.

References

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

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