CVE-2026-58077 is a stored cross-site scripting vulnerability (CWE-79) in the 4Analytics extension for Joomla by weeblr.com. The vulnerability arises from improper neutralization of input during web page generation, allowing an unauthenticated attacker to submit specially crafted requests that result in persistent malicious script injection. This can lead to website takeover in some scenarios. The vulnerability affects versions 1.0 through 5.0.1 of the extension. The CVSS 4.0 base score is 8.7, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability. No patch or official remediation has been disclosed as of the publication date.

An unauthenticated attacker can exploit this vulnerability to inject and store malicious scripts within the affected Joomla extension, potentially leading to website takeover. The impact includes compromise of confidentiality, integrity, and availability of the affected web application. This could allow attackers to execute arbitrary scripts in the context of the victim's browser, steal sensitive information, or perform unauthorized actions on the website.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider applying temporary mitigations such as disabling the 4Analytics extension or restricting access to it. Monitor vendor communications for updates on patches or official fixes.