CVE-2025-8976 in Vvveb
Summary
by MITRE • 08/14/2025
A vulnerability has been found in givanz Vvveb up to 1.0.5. This vulnerability affects unknown code of the file /vadmin123/index.php?module=content/post&type=post of the component Endpoint. The manipulation leads to cross site scripting. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 1.0.6 is able to address this issue. It is recommended to upgrade the affected component.
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Analysis
by VulDB Data Team • 08/19/2025
The vulnerability identified as CVE-2025-8976 represents a critical cross site scripting flaw within the givanz Vvveb content management system version 1.0.5 and earlier. This security weakness resides in the administrative endpoint at /vadmin123/index.php?module=content/post&type=post, where user-supplied input fails to undergo proper sanitization or validation before being rendered in the web application's response. The flaw allows malicious actors to inject arbitrary JavaScript code into the application's output, creating a persistent vector for exploitation that can compromise user sessions and potentially escalate privileges within the administrative interface.
The technical nature of this vulnerability aligns with CWE-79 which specifically addresses cross site scripting flaws where input data is not properly escaped or validated before being included in web pages. This particular implementation vulnerability demonstrates a failure in the application's input validation and output encoding mechanisms, creating an environment where attacker-controlled data can be executed within the context of other users' browsers. The attack vector is remotely exploitable, meaning that an unauthenticated attacker can initiate the malicious payload through web requests without requiring local system access or prior authentication within the application.
The operational impact of this vulnerability extends beyond simple script execution, as it provides adversaries with the capability to hijack user sessions, steal sensitive information, modify content within the administrative interface, and potentially establish persistent backdoors within the compromised system. The disclosure of the exploit to the public community significantly increases the risk profile, as it removes the element of exploit scarcity that typically protects vulnerable systems. Attackers can leverage this vulnerability to perform session hijacking attacks, deface website content, or redirect users to malicious domains that can harvest credentials or deploy additional malware payloads.
The recommended mitigation strategy involves upgrading the affected givanz Vvveb component to version 1.0.6 or later, which contains the necessary patches to address the cross site scripting vulnerability. Organizations should implement comprehensive input validation mechanisms that sanitize all user-supplied data before processing, employ proper output encoding for all dynamic content, and establish robust content security policies to prevent unauthorized script execution. Additionally, implementing web application firewalls and monitoring for suspicious request patterns can provide additional layers of defense. The vulnerability's classification under ATT&CK technique T1059.007 for script injection highlights the need for defensive measures that specifically target automated exploitation attempts and monitor for malicious script delivery within web applications.