CVE-2025-4859 in DAP-2695
Summary
by MITRE • 05/18/2025
A vulnerability was found in D-Link DAP-2695 120b36r137_ALL_en_20210528. It has been rated as problematic. This issue affects some unknown processing of the file /adv_macbypass.php of the component MAC Bypass Settings Page. The manipulation of the argument f_mac leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. Other parameters might be affected as well. This vulnerability only affects products that are no longer supported by the maintainer.
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Analysis
by VulDB Data Team • 05/18/2025
The vulnerability identified as CVE-2025-4859 represents a cross site scripting flaw within the D-Link DAP-2695 wireless access point firmware version 120b36r137_ALL_en_20210528. This security weakness resides in the MAC Bypass Settings Page component, specifically within the /adv_macbypass.php file where the f_mac parameter is processed without adequate input validation or output sanitization. The vulnerability falls under the CWE-79 category of Cross-Site Scripting, which occurs when an application incorporates untrusted data into web pages without proper validation or encoding, allowing malicious scripts to be executed in the context of other users' browsers.
The technical exploitation of this vulnerability requires remote access to the affected device, as the attack vector is reachable through network-based interactions with the web interface. The flaw manifests when the f_mac argument is manipulated by an attacker, enabling the injection of malicious JavaScript code that can be executed in the victim's browser session. This cross site scripting vulnerability allows threat actors to potentially steal session cookies, perform unauthorized actions on behalf of users, or redirect victims to malicious websites. The vulnerability's impact is particularly concerning given that the affected firmware version is no longer supported by the vendor, meaning no security updates or patches are available to remediate the issue.
From an operational perspective, this vulnerability poses significant risks to network security infrastructure, as wireless access points serve as critical components in network access control and authentication. The D-Link DAP-2695 device, when compromised through this XSS flaw, could provide attackers with unauthorized access to the network's MAC bypass functionality, potentially allowing them to bypass network security controls. The fact that this exploit has been publicly disclosed increases the likelihood of real-world exploitation, as malicious actors can readily leverage existing attack tools and techniques. The vulnerability's remote exploitability means that attackers do not require physical access to the device, making it particularly dangerous for organizations that have not yet migrated away from unsupported firmware versions.
Organizations utilizing the affected D-Link DAP-2695 devices should immediately implement network segmentation and monitoring to detect potential exploitation attempts. The most effective mitigation strategy involves replacing the vulnerable hardware with supported models that receive regular security updates, as the original firmware is no longer maintained by the vendor. Network administrators should also consider implementing web application firewalls to detect and block malicious script injection attempts, though this represents a temporary workaround rather than a permanent solution. Additionally, organizations should conduct comprehensive vulnerability assessments of their entire network infrastructure to identify other potentially unsupported devices that may be similarly vulnerable. The ATT&CK framework categorizes this type of vulnerability under T1190 - Exploit Public-Facing Application, and T1566 - Phishing, as attackers may leverage this vulnerability as part of broader attack campaigns targeting network infrastructure components.