CVE-2023-24009 in Upfrontwp Theme
Summary
by MITRE • 08/10/2023
Auth. (subscriber+) Reflected Cross-site Scripting (XSS) vulnerability in Wpazure Themes Upfrontwp theme <= 1.1 versions.
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Analysis
by VulDB Data Team • 09/05/2023
The CVE-2023-24009 vulnerability represents a critical authenticated reflected cross-site scripting flaw within the Upfrontwp theme for WordPress platforms. This vulnerability specifically affects versions 1.1 and earlier, targeting users with subscriber-level privileges or higher access rights within the WordPress administration interface. The issue stems from insufficient input validation and output sanitization mechanisms within the theme's codebase, creating an exploitable vector for malicious actors to inject malicious scripts into web pages viewed by other users. The vulnerability manifests when authenticated users interact with specific theme administrative functions that fail to properly escape or filter user-supplied data before rendering it within HTML contexts.
The technical exploitation of this vulnerability occurs through the manipulation of parameters within the theme's administrative interfaces, where reflected XSS attacks can be executed by tricking authenticated users into clicking maliciously crafted links. When users with subscriber privileges or higher access levels navigate to specifically crafted URLs containing malicious script payloads, the theme fails to properly sanitize these inputs before displaying them in the browser context. This vulnerability falls under CWE-79 which specifically addresses Cross-site Scripting flaws, and aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments or links. The reflected nature of this vulnerability means that the malicious script is reflected off the web server rather than being stored, making it particularly dangerous in targeted attack scenarios where attackers can craft specific payloads that will execute in the context of authenticated users' browsers.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with the capability to perform session hijacking, data exfiltration, and privilege escalation within the compromised WordPress environment. An attacker with subscriber-level access can leverage this vulnerability to escalate privileges, steal session cookies, and potentially gain administrative control over the WordPress site. The vulnerability creates a persistent threat vector that can be exploited repeatedly, as authenticated users are required to interact with the malicious payloads, making it particularly dangerous in environments where multiple users with varying privilege levels access the same administrative interface. Additionally, the reflected nature of the attack means that exploitation does not require server-side persistence, making detection more challenging and allowing for rapid deployment of attack payloads.
Mitigation strategies for CVE-2023-24009 should prioritize immediate patching of the Upfrontwp theme to versions that address the reflected XSS vulnerability. Organizations should implement strict input validation and output encoding mechanisms throughout their WordPress installations, particularly within theme and plugin code that handles user-supplied data. Security measures should include the implementation of Content Security Policy headers to prevent unauthorized script execution, regular security audits of theme and plugin code, and the enforcement of least privilege access controls within WordPress administrative interfaces. Network monitoring solutions should be configured to detect anomalous user behavior patterns that may indicate exploitation attempts, while regular security assessments should include vulnerability scanning specifically targeting reflected XSS flaws in web applications. The implementation of web application firewalls and security headers can provide additional protection layers against exploitation attempts, though these should complement rather than replace proper code-level fixes and access control measures.