SB2023053042 - Multiple vulnerabilities in Joomla!

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Improper control of interaction frequency (CVE-ID: CVE-2023-23755)

The vulnerability allows a remote attacker to perform brute-force attack.

The vulnerability exists due to missing rate limitation checks within the mfa screen. A remote attacker can perform brute-force attacks against MFA methods.

2) Cross-site scripting (CVE-ID: CVE-2023-23754)

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within the new mfa selection screen. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website or perform open redirect attacks.

Remediation

Install update from vendor's website.

References

• https://developer.joomla.org/security-centre/900-20230502-core-bruteforce-prevention-within-the-mfa-screen.html
• https://developer.joomla.org/security-centre/899-20230501-core-open-redirects-and-xss-within-the-mfa-selection.html