CVE-2025-71248 in SPIP
Summary
by MITRE • 02/19/2026
SPIP before 4.4.9 allows Stored Cross-Site Scripting (XSS) via syndicated sites in the private area. The #URL_SYNDIC output is not properly sanitized on the private syndicated site page, allowing an attacker who can set a malicious syndication URL to inject persistent scripts that execute when other administrators view the syndicated site details.
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Analysis
by VulDB Data Team • 02/19/2026
The vulnerability identified as CVE-2025-71248 affects the SPIP content management system prior to version 4.4.9, specifically targeting the private administrative area where syndicated sites are managed. This stored cross-site scripting flaw represents a significant security risk to organizations relying on SPIP for content management, as it enables attackers to inject malicious scripts that persistently execute when administrators access syndicated site details. The vulnerability occurs within the handling of the #URL_SYNDIC output parameter, which is used to display syndication URLs in the administrative interface. When an attacker successfully sets a malicious syndication URL, the system fails to properly sanitize this input before rendering it in the private area, creating a persistent XSS vector that can compromise administrator sessions and potentially lead to full system compromise.
The technical implementation of this vulnerability stems from inadequate input validation and output sanitization mechanisms within the SPIP framework's private administrative interface. The #URL_SYNDIC directive processes external syndication URLs without sufficient sanitization, allowing malicious payloads to be stored in the system's database and subsequently executed whenever the affected administrative page is loaded. This stored nature of the vulnerability means that the malicious script persists even after the initial injection, making it particularly dangerous as it can affect multiple administrators over time without requiring repeated exploitation attempts. The flaw aligns with CWE-79, which specifically addresses cross-site scripting vulnerabilities resulting from insufficient output escaping or sanitization of user-controllable data.
The operational impact of CVE-2025-71248 extends beyond simple script execution, as it provides attackers with a potential foothold for more sophisticated attacks within the administrative environment. Administrators who view the syndicated site details page become victims of the stored XSS, creating opportunities for session hijacking, credential theft, or redirection to malicious sites. Attackers could potentially leverage this vulnerability to escalate privileges, modify content, or access sensitive administrative functions that are typically restricted to authorized users. The persistence of the vulnerability means that even after the initial attack, the malicious scripts continue to execute, allowing for ongoing surveillance or manipulation of the system. This threat model aligns with ATT&CK technique T1566.001 for initial access through malicious links and T1059.001 for command and scripting interpreter execution.
Mitigation strategies for this vulnerability should focus on immediate patching of the SPIP system to version 4.4.9 or later, where the sanitization issues have been addressed. Organizations should also implement additional defensive measures including input validation for all syndication URL entries, regular security scanning of administrative interfaces, and monitoring for suspicious administrative activities. Network segmentation and privileged access controls can help limit the potential damage if exploitation occurs, while regular security awareness training for administrators can help identify social engineering attempts that might lead to successful exploitation. The vulnerability demonstrates the critical importance of proper input sanitization in web applications, particularly in administrative interfaces where privileged access is granted, and serves as a reminder of the need for comprehensive security testing throughout the software development lifecycle.