CVE-2022-41830 is a stored cross-site scripting (XSS) vulnerability affecting a broad range of Kyocera Document Solutions multifunction printers (MFPs) and printers. This vulnerability allows a remote attacker who has authenticated administrative privileges on the affected device to inject arbitrary malicious scripts into the device's web interface. The vulnerability is classified as CWE-79, indicating improper neutralization of input leading to XSS. The affected products include numerous TASKalfa series models (e.g., 7550ci, 6550ci, 5550ci, 4550ci, 3550ci, 3050ci, 255c, 205c, 256ci, 206ci, 8000i, 6500i, 5500i, 4500i, 3500i, 305, 255, 306i, 256i), ECOSYS models (M6526cdn, M6526cidn, M2535dn, P6026cdn, P4040dn, P2135dn), FS series (C2126MFP, C2126MFP+, C2026MFP, C2026MFP+, C5250DN, 1370DN), and LS series (3140MFP, 3140MFP+, 3640MFP, 1135MFP, 1035MFP, C8650DN, C8600DN, 4300DN, 4200DN, 2100DN). The vulnerability requires the attacker to have administrative privileges and some user interaction, such as accessing the device's web interface, to exploit. The CVSS v3.1 base score is 4.8 (medium severity), with vector AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N, indicating network attack vector, low attack complexity, high privileges required, user interaction required, scope changed, and low impact on confidentiality and integrity, with no impact on availability. Exploitation could allow the attacker to execute arbitrary scripts in the context of the device's management interface, potentially leading to session hijacking, unauthorized actions, or further compromise of the device or connected network. No known exploits in the wild have been reported to date. The vulnerability stems from insufficient input sanitization in the web interface of the affected devices, allowing malicious script injection that is stored and executed when accessed by legitimate users or administrators.

For European organizations, the impact of this vulnerability can be significant, especially in environments where Kyocera MFPs and printers are widely deployed and integrated into critical business workflows. Exploitation could allow an attacker with administrative credentials to execute malicious scripts, potentially leading to unauthorized access to sensitive information, manipulation of print jobs, or pivoting to other internal systems. Given that many organizations rely on these devices for document handling, including confidential and regulated data, the integrity and confidentiality of information could be compromised. Additionally, the vulnerability could be leveraged to conduct further attacks such as credential theft or lateral movement within the network. The requirement for administrative privileges limits the attack surface but does not eliminate risk, as credential compromise or insider threats could enable exploitation. The medium CVSS score reflects moderate risk; however, in high-security environments such as government agencies, financial institutions, or healthcare providers in Europe, even medium-severity vulnerabilities in networked devices can have outsized consequences. The lack of known public exploits reduces immediate risk but does not preclude targeted attacks or future exploit development.

Apply vendor-supplied firmware updates or patches as soon as they become available to address the XSS vulnerability. Restrict administrative access to the printer's web interface by implementing network segmentation and access control lists (ACLs) to limit management interface exposure to trusted administrators only. Enforce strong authentication mechanisms for administrative accounts, including complex passwords and, where supported, multi-factor authentication (MFA). Regularly audit and monitor administrative access logs for unusual or unauthorized activity to detect potential exploitation attempts early. Disable unnecessary web interface features or services on the devices that are not required for business operations to reduce the attack surface. Implement strict input validation and sanitization policies on any custom integrations or scripts interacting with the printer's web interface, if applicable. Educate administrators on the risks of XSS and the importance of cautious interaction with device management interfaces, especially when handling unexpected or suspicious inputs. Consider deploying web application firewalls (WAFs) or intrusion detection/prevention systems (IDS/IPS) that can detect and block malicious script payloads targeting the printer's management interface.