Cross-site scripting in Joomla! - CVE-2025-63083
Published: January 6, 2026
Vulnerability identifier: #VU121003
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2025-63083
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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 in the pagebreak plugin. 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.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Affected software
Joomla!
How to mitigate CVE-2025-63083
Install updates from vendor's website.
Joomla! - addressed in versions 5.4.2, 6.0.2