CVE-2021-23127
[20210301] - Core - Insecure randomness within 2FA secret generation
CRITICAL
9.1
CVSS Score
Published: March 4, 2021 at 05:37 PM UTC
Updated: June 17, 2026 at 03:38 AM UTC
1 product affected across 1 vendorJoomla!
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Severity
CRITICAL9.1
Exploit prediction
EPSS 1%
Description
An issue was discovered in Joomla! 3.2.0 through 3.9.24. Usage of an insufficient length for the 2FA secret accoring to RFC 4226 of 10 bytes vs 20 bytes.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
3.2.0 ≤ v < 3.9.253.2.0-3.9.24
Affected range stops below 3.9.25, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
x_refsource_MISCVendor Advisory
Source: [email protected]
https://developer.joomla.org/security-centre/841-20210301-core-insecure-randomness-within-2fa-secret-generation.htmlCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfo
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