CVE-2025-10026 is a cross-site scripting (XSS) vulnerability identified in version 1.0 of the itsourcecode POS Point of Sale System. The vulnerability resides in an unspecified functionality within the file /inventory/main/vendors/datatables/unit_testing/templates/-complex_header.php. Specifically, the issue arises from improper sanitization or validation of the 'scripts' argument, which an attacker can manipulate to inject malicious scripts. This vulnerability can be exploited remotely without requiring authentication, although it does require some level of user interaction (e.g., a user visiting a crafted URL or interacting with a malicious payload). The CVSS 4.0 base score is 5.1, indicating a medium severity level. The vector details show that the attack vector is network-based (AV:N), with low attack complexity (AC:L), no privileges required (PR:L suggests some privileges but the description says no authentication needed, so this might be a minor discrepancy), and user interaction is required (UI:P). The vulnerability impacts confidentiality and integrity to a limited extent (VC:N, VI:L), with no impact on availability. No patches or fixes have been published yet, and no known exploits are currently observed in the wild, although proof-of-concept code has been made public. The vulnerability affects a POS system, which is critical infrastructure in retail and hospitality sectors, making it a significant concern for organizations relying on this software for transaction processing and inventory management. Exploiting this XSS could allow attackers to execute arbitrary scripts in the context of the POS system's web interface, potentially leading to session hijacking, credential theft, or manipulation of displayed data, which could facilitate fraud or further compromise.

For European organizations using the itsourcecode POS Point of Sale System version 1.0, this vulnerability presents a moderate risk. POS systems are integral to retail and hospitality businesses, handling sensitive customer payment data and transaction records. Successful exploitation of this XSS vulnerability could enable attackers to steal session cookies or credentials of employees managing the POS, inject fraudulent transaction data, or redirect users to malicious sites. This could lead to financial losses, reputational damage, and regulatory penalties under GDPR if customer data confidentiality is compromised. Additionally, since POS systems often integrate with inventory and financial systems, the integrity of business-critical data could be undermined, affecting operational continuity. The remote exploitability and public availability of exploit code increase the likelihood of attempted attacks, especially in environments where the POS system is accessible over internal or external networks. The requirement for user interaction means phishing or social engineering could be used to trigger the exploit. Overall, the threat could disrupt retail operations and expose sensitive data, making it a priority for affected organizations to address.

Given the absence of an official patch, organizations should implement several targeted mitigations: 1) Restrict network access to the POS system interface, ensuring it is not exposed to the public internet and is accessible only from trusted internal networks or via VPN. 2) Employ web application firewalls (WAFs) with custom rules to detect and block suspicious input patterns targeting the 'scripts' parameter or related request vectors. 3) Conduct thorough input validation and output encoding on all user-supplied data within the POS system, if source code access and modification are possible, to neutralize malicious scripts. 4) Educate employees about phishing and social engineering risks to reduce the chance of user interaction triggering the exploit. 5) Monitor logs and network traffic for unusual activity indicative of exploitation attempts, such as unexpected script injections or anomalous user behavior. 6) Isolate the POS system from other critical infrastructure to limit lateral movement if compromised. 7) Engage with the vendor for updates or patches and plan for prompt application once available. 8) Consider deploying Content Security Policy (CSP) headers to restrict script execution sources, mitigating the impact of XSS attacks.