Overview
In the realm of cybersecurity, one of the most prevalent vulnerabilities is Cross Site Scripting (XSS). This vulnerability has once again reared its ugly head in the recent Common Vulnerabilities and Exposures (CVE) identified as CVE-2025-46198. This particular vulnerability affects the Grav Content Management System (CMS), specifically versions 1.7.46 through 1.7.48. It’s a critical issue as it allows an attacker to execute arbitrary code through a seemingly benign image element. Given the prominence and widespread use of Grav CMS, this vulnerability has the potential to compromise systems and data on a large scale.
Vulnerability Summary
CVE ID: CVE-2025-46198
Severity: High (8.8 based on CVSS score)
Attack Vector: Cross Site Scripting (XSS)
Privileges Required: None
User Interaction: Required
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
Grav CMS | 1.7.46
Grav CMS | 1.7.47
Grav CMS | 1.7.48
How the Exploit Works
The exploit takes advantage of a Cross Site Scripting (XSS) vulnerability. A successful attack involves an attacker injecting malicious scripts into webpages viewed by other users. Specifically, CVE-2025-46198 allows an attacker to execute arbitrary code via the ‘onerror’ attribute of the ‘img’ element. This attribute is designed to handle error events; however, in this scenario, it becomes a loophole through which an attacker can inject and execute harmful scripts.
Conceptual Example Code
Consider the following conceptual example of how the vulnerability might be exploited. This is a simplified representation and the actual malicious script can be far more sophisticated and damaging.
<img src="nonexistent.jpg" onerror="malicious_script();">In this example, the ‘src’ attribute is set to a non-existent image, which triggers the ‘onerror’ event. This event then executes the ‘malicious_script()’, which could be any arbitrary code that the attacker wishes to run on the user’s system.
Remember, this is a high severity vulnerability. It’s recommended to apply the vendor patch as soon as it’s available. In the meantime, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as a temporary mitigation.