MFA authentication bypass in Joomla!

1) Improper Authentication

EUVDB-ID: #VU107208

Risk: Medium

CVSSv4.0: 5.2 [CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-25227

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass MFA authentication process.

The vulnerability exists due to an error when handling MFA authentication process. A remote attacker with valid credentials can bypass MFA authentication process and gain unauthorized access to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Joomla!: 1.0.0 - 13.1

CPE2.3

• cpe:2.3:a:joomla:joomla:1.0.15:*:*:*:*:*:*:*
• cpe:2.3:a:joomla:joomla:1.5.26:*:*:*:*:*:*:*
• cpe:2.3:a:joomla:joomla:1.6.6:*:*:*:*:*:*:*
• cpe:2.3:a:joomla:joomla:1.7.5:*:*:*:*:*:*:*
• cpe:2.3:a:joomla:joomla:2.5.28:*:*:*:*:*:*:*
• cpe:2.3:a:joomla:joomla:*:*:*:*:*:*:*:*
• cpe:2.3:a:joomla:joomla:3.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:joomla:joomla:3.10.20:*:*:*:*:*:*:*
• cpe:2.3:a:joomla:joomla:3.2.7:*:*:*:*:*:*:*
• cpe:2.3:a:joomla:joomla:3.3.6:*:*:*:*:*:*:*

External links

https://developer.joomla.org/security-centre/964-20250402-core-mfa-authentication-bypass.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.