CVE-2026-48903
Description
Inadequate content filtering within the checkAttribute methods leads to XSS vulnerabilities in various components.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Inadequate content filtering in Joomla! checkAttribute methods leads to XSS vulnerabilities in versions 3.0.0-5.4.5 and 6.0.0-6.1.0.
Vulnerability
The checkAttribute methods in Joomla! CMS fail to adequately filter content, allowing injection of malicious HTML attributes. This affects versions 3.0.0 through 5.4.5 and 6.0.0 through 6.1.0 [1]. The vulnerability is present in various components that rely on these methods for attribute validation.
Exploitation
An attacker can craft input containing malicious JavaScript or HTML attributes that bypass the inadequate filtering. When a user interacts with a page that renders this input (e.g., by viewing a comment or clicking a link), the injected script executes in the user's browser. No authentication is required for exploitation, but user interaction is necessary [1].
Impact
Successful exploitation leads to cross-site scripting (XSS), allowing the attacker to execute arbitrary JavaScript in the context of the victim's session. This can result in session hijacking, defacement, or theft of sensitive information. The impact is rated as Moderate [1].
Mitigation
Joomla! has released fixed versions 5.4.6 and 6.1.1. Users should upgrade immediately. No workarounds are provided in the advisory [1].
AI Insight generated on May 26, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1News mentions
0No linked articles in our index yet.