CVE-2025-70958 in Subrion
Summary
by MITRE • 02/03/2026
Multiple reflected cross-site scripting (XSS) vulnerabilities in the installation module of Subrion CMS v4.2.1 allows attackers to execute arbitrary Javascript in the context of the user's browser via injecting a crafted payload into the dbuser, dbpwd, and dbname parameters.
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Analysis
by VulDB Data Team • 02/12/2026
The vulnerability CVE-2025-70958 represents a critical security flaw in Subrion CMS version 4.2.1 that affects the installation module through multiple reflected cross-site scripting vectors. This issue stems from insufficient input validation and output encoding within the database configuration parameters during the content management system installation process. Attackers can exploit this weakness by injecting malicious javascript code into the dbuser, dbpwd, and dbname parameters, which are then reflected back to the victim's browser without proper sanitization. The vulnerability occurs specifically during the initial setup phase when the installation wizard processes user-provided database credentials and connection details, creating an attack surface where malicious payloads can persist and execute in the context of authenticated users.
The technical implementation of this vulnerability aligns with CWE-79 which defines cross-site scripting flaws as the injection of malicious code into web applications that can be executed by other users. The reflected nature of the vulnerability indicates that the malicious payloads are immediately reflected back to the user's browser without being stored on the server, making it particularly dangerous as it can be delivered through various attack vectors including phishing emails, compromised websites, or social engineering campaigns. The installation module's failure to properly escape or validate user inputs creates a persistent threat that can be exploited by attackers who gain access to the installation interface or manipulate the installation process through crafted HTTP requests.
The operational impact of CVE-2025-70958 extends beyond simple script execution, as it can enable attackers to perform a wide range of malicious activities including session hijacking, credential theft, data exfiltration, and potential privilege escalation within the CMS environment. When an attacker successfully injects javascript code through these parameters, they can establish persistent browser-based attacks that may capture user credentials, modify website content, redirect users to malicious sites, or even leverage the compromised installation process to gain deeper access to the underlying system. The vulnerability is particularly concerning because it affects the installation phase of the CMS, which often occurs during initial system deployment when administrators may be less vigilant about security monitoring and validation of inputs.
Mitigation strategies for CVE-2025-70958 should prioritize immediate patching of the Subrion CMS installation module to ensure proper input validation and output encoding for all database configuration parameters. Security measures must include implementing proper parameter sanitization routines that escape special characters and validate input formats before processing database connection details. Organizations should also consider restricting access to the installation module to trusted administrators only and implementing web application firewalls that can detect and block malicious payloads targeting these specific parameters. Additionally, security monitoring should be enhanced to detect unusual patterns in installation requests, and regular security audits should verify that all user inputs are properly validated and sanitized according to established security standards and best practices. The vulnerability demonstrates the critical importance of input validation in web applications and aligns with ATT&CK technique T1203 which covers legitimate credentials access through web application vulnerabilities.