CVE-2025-24320 in BIG-IP
Summary
by MITRE • 02/05/2025
A stored cross-site scripting (XSS) vulnerability exists in an undisclosed page of the BIG-IP Configuration utility that allows an attacker to run JavaScript in the context of the currently logged-in user. This vulnerability is due to an incomplete fix for CVE-2024-31156 https://my.f5.com/manage/s/article/K000138636 .
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
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Analysis
by VulDB Data Team • 10/21/2025
The vulnerability CVE-2025-24320 represents a stored cross-site scripting flaw within the BIG-IP Configuration utility, a critical component of F5 Networks' application delivery controller platform. This security weakness exists in an undisclosed page of the configuration interface and allows malicious actors to inject persistent JavaScript code that executes within the context of authenticated user sessions. The vulnerability stems from an incomplete remediation of a previously disclosed issue, CVE-2024-31156, which was documented in F5's knowledge base article K000138636. The persistence of this flaw indicates that the initial patch or mitigation strategy failed to address all attack vectors, leaving the system vulnerable to sophisticated exploitation attempts that could compromise the integrity of user sessions and potentially escalate to full system compromise.
The technical implementation of this vulnerability involves the failure to properly sanitize or validate user input within the affected configuration utility page. When authenticated users interact with the vulnerable page, malicious JavaScript code injected by an attacker can be stored within the application's backend systems and subsequently executed whenever legitimate users access the affected functionality. This stored nature of the vulnerability makes it particularly dangerous as it can affect multiple users over time without requiring repeated exploitation attempts. The flaw operates at the application layer, specifically targeting the web interface's input handling mechanisms and demonstrating a weakness in the application's security controls that should have been addressed in the previous patch cycle.
From an operational impact perspective, this vulnerability creates significant risks for organizations utilizing F5 BIG-IP systems, as it enables attackers to execute arbitrary code within the context of authenticated user sessions. The implications extend beyond simple data theft, as attackers could potentially escalate privileges, access sensitive configuration data, manipulate system settings, or use the compromised session to pivot to other network resources. The vulnerability's presence in the configuration utility interface means that even administrators with elevated privileges could be compromised, potentially leading to complete system takeover. This risk is compounded by the fact that the affected systems are typically critical infrastructure components that require high availability and security, making any exploitation potentially catastrophic for business continuity.
Organizations should implement immediate mitigations including applying the latest security patches from F5 that properly address both CVE-2025-24320 and its predecessor CVE-2024-31156. Network segmentation and access controls should be enhanced to limit exposure of the affected configuration utility to only necessary administrative personnel. Additionally, implementing web application firewalls and content security policies can provide additional layers of protection against exploitation attempts. Security monitoring should be enhanced to detect unusual activity patterns in the configuration utility, and regular security assessments should be conducted to identify similar incomplete fixes in other components. This vulnerability aligns with CWE-79, which describes cross-site scripting flaws, and represents a potential pathway for attackers to leverage the MITRE ATT&CK framework's privilege escalation and persistence techniques. Organizations must also consider the broader implications of incomplete security remediations and establish more robust validation processes for patch implementation to prevent similar issues from recurring in their security infrastructure.