CVE-2025-23441 in Attach Gallery Posts Plugin
Summary
by MITRE • 03/03/2025
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in NotFound Attach Gallery Posts allows Reflected XSS. This issue affects Attach Gallery Posts: from n/a through 1.6.
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Analysis
by VulDB Data Team • 03/03/2025
The vulnerability identified as CVE-2025-23441 represents a critical cross-site scripting flaw within the NotFound Attach Gallery Posts plugin, specifically targeting versions ranging from n/a through 1.6. This weakness falls under the well-documented CWE-79 category of Cross-Site Scripting, which occurs when web applications fail to properly sanitize user input before incorporating it into dynamically generated web pages. The vulnerability manifests as a reflected XSS attack, meaning that malicious input is immediately reflected back to users through the web application without adequate sanitization or encoding mechanisms. The affected plugin appears to process user-supplied data during the generation of gallery posts, creating an opportunity for attackers to inject malicious scripts that execute in the context of other users' browsers.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding practices within the plugin's codebase. When users interact with gallery posts or submit data through the plugin's interface, the application does not properly neutralize potentially harmful characters or script sequences that could be embedded in the input. This failure allows attackers to craft malicious payloads that, when processed by the plugin, get executed in the browsers of unsuspecting victims who view the affected gallery pages. The reflected nature of the vulnerability means that the malicious script must be injected through external means such as crafted URLs or form submissions, and the attack payload is immediately reflected back to the user's browser without any server-side storage or processing of the malicious content.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with the capability to perform various malicious activities within the context of affected users' sessions. Attackers could potentially steal session cookies, redirect users to malicious websites, deface gallery pages, or execute other unauthorized actions that compromise the integrity and confidentiality of the affected web application. The vulnerability affects a specific range of plugin versions, suggesting that the issue was either introduced in a particular release or was not properly addressed in earlier versions, making it crucial for administrators to assess their current plugin installations and determine if they fall within the vulnerable range. This vulnerability also represents a significant risk to user trust and application security, as it enables attackers to exploit the legitimate functionality of the gallery plugin to deliver malicious content.
Mitigation strategies for this vulnerability should prioritize immediate plugin updates to versions that address the reflected XSS flaw, as developers typically release patches that implement proper input sanitization and output encoding mechanisms. Security professionals should also implement additional protective measures including the deployment of web application firewalls that can detect and block malicious script patterns, implementing content security policies to restrict script execution, and conducting regular security audits of plugin code to identify similar vulnerabilities. Organizations should also consider implementing input validation at multiple layers including client-side and server-side controls, ensuring that all user-supplied data undergoes proper sanitization before being processed or displayed. The vulnerability underscores the importance of following secure coding practices such as those outlined in the OWASP Secure Coding Practices and aligns with ATT&CK technique T1059.001 for command and scripting interpreter, as attackers can leverage this vulnerability to execute malicious scripts through compromised web application interfaces.