CVE-2018-20302 in Xain
Summary
by MITRE
An XSS issue was discovered in Steve Pallen Xain before 0.6.2 via the order parameter.
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Analysis
by VulDB Data Team • 03/31/2026
The vulnerability identified as CVE-2018-20302 represents a cross-site scripting flaw within the Steve Pallen Xain web application version prior to 0.6.2. This issue specifically manifests through improper input validation of the order parameter, creating a pathway for malicious actors to inject arbitrary web scripts into the application's response. The vulnerability falls under the category of client-side injection attacks and demonstrates a critical weakness in the application's data sanitization processes.
The technical implementation of this vulnerability stems from the application's failure to properly sanitize user-supplied input when processing the order parameter. When users provide input through this parameter, the application directly incorporates it into the HTML response without adequate encoding or validation mechanisms. This allows attackers to craft malicious payloads that execute within the context of other users' browsers, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of victims. The vulnerability is classified as CWE-79, which specifically addresses Cross-Site Scripting flaws in software applications.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to manipulate the application's behavior and compromise user sessions. An attacker could exploit this weakness to inject malicious scripts that steal session cookies, redirect users to phishing sites, or modify the application interface to deceive users. Given that this vulnerability affects the order parameter, it could potentially be leveraged to manipulate order processing flows or access sensitive order-related information. The attack vector is particularly concerning as it requires minimal privileges and can be executed through standard web browser interactions.
Mitigation strategies for CVE-2018-20302 should prioritize immediate patching of the affected application to version 0.6.2 or later, which contains the necessary input validation fixes. Additionally, implementing comprehensive input sanitization measures including proper HTML encoding of all user-supplied data, implementing Content Security Policy headers, and utilizing secure coding practices such as parameterized queries for all dynamic content generation. The vulnerability aligns with ATT&CK technique T1203, which covers exploitation for credential access through web application vulnerabilities, and should be addressed as part of broader application security hardening efforts. Organizations should also consider implementing web application firewalls and regular security scanning to detect similar vulnerabilities in other application components.