CVE-2024-26484 in Kirby
Summary
by MITRE • 02/22/2024
A stored cross-site scripting (XSS) vulnerability in the Edit Content Layout module of Kirby CMS v4.1.0 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Link field.
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Analysis
by VulDB Data Team • 04/18/2025
The stored cross-site scripting vulnerability identified as CVE-2024-26484 resides within the Edit Content Layout module of Kirby CMS version 4.1.0, representing a critical security flaw that undermines the integrity of web applications built on this content management platform. This vulnerability specifically affects the handling of user input within the Link field of the content editing interface, creating a persistent attack vector that can compromise user sessions and execute malicious code in the context of affected web applications.
The technical flaw manifests when an attacker crafts a malicious payload and injects it into the Link field of the content layout module. The vulnerability stems from insufficient input validation and output sanitization mechanisms within the CMS's content handling pipeline, allowing malicious scripts to be stored in the application's database and subsequently executed whenever the affected content is rendered in a user's browser. This stored nature of the vulnerability means that the malicious code persists even after the initial injection, making it particularly dangerous as it can affect multiple users over time without requiring repeated exploitation attempts. The vulnerability maps directly to CWE-79, which describes Cross-Site Scripting flaws, specifically highlighting the stored variant where malicious content is permanently stored on the target server.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform session hijacking, steal sensitive user information, manipulate content displayed to other users, and potentially escalate privileges within the CMS environment. When users access pages containing the maliciously injected content, their browsers execute the embedded scripts, which can redirect them to malicious sites, steal cookies, or perform unauthorized actions on their behalf. The attack surface is particularly concerning for content editors and administrators who regularly interact with the CMS interface, as they become prime targets for this type of persistent attack vector. According to ATT&CK framework, this vulnerability aligns with T1566.001 (Phishing via Social Engineering) and T1059.001 (Command and Scripting Interpreter), as it enables attackers to establish persistent access through malicious content injection.
Mitigation strategies for CVE-2024-26484 should prioritize immediate patching of the affected Kirby CMS version to the latest available release that addresses this specific vulnerability. Organizations should implement comprehensive input validation and output encoding measures to prevent similar issues in custom applications built on or alongside the CMS platform. Additionally, security teams should consider implementing web application firewalls with XSS detection capabilities, conducting regular security audits of content management interfaces, and establishing robust monitoring procedures to detect anomalous content injection patterns. The implementation of Content Security Policy headers can provide an additional layer of defense by restricting the sources from which scripts can be executed, thereby limiting the potential impact of successful XSS attacks. Regular security training for content editors and administrators is also essential to help them recognize and avoid potential social engineering attempts that might exploit this vulnerability.