CVE-2026-105887 in Robo Gallery Plugin
Summary
by MITRE • 10/08/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Robosoft Robo Gallery robo-gallery allows Stored XSS.This issue affects Robo Gallery: from n/a through 5.1.6.
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Analysis
by VulDB Data Team • 10/08/2026
The identified security flaw represents a classic instance of Improper Neutralization of Input During Web Page Generation, commonly known as Cross-Site Scripting or XSS. Specifically, this vulnerability manifests as a Stored XSS within the Robosoft Robo Gallery plugin for WordPress, affecting versions ranging from n/a through 5.1.6. Unlike reflected XSS attacks where malicious scripts are embedded in URLs and executed only when a victim clicks a specific link, stored XSS vulnerabilities persist on the target server. In this context, the vulnerability allows an attacker to inject malicious client-side script code into web pages that are viewed by other users. The persistence of this payload means that every time a user loads the affected gallery page, the injected script executes in their browser session, potentially leading to significant security compromises without further interaction from the victim beyond viewing the content.
From a technical perspective, the root cause lies in insufficient input validation and output encoding mechanisms within the plugin's codebase. When users or administrators submit data for display in the Robo Gallery interface, such as image captions, titles, or custom descriptions, the application fails to properly sanitize these inputs before rendering them into HTML. This lack of neutralization allows special characters like angle brackets, quotes, and ampersands to pass through unaltered. Consequently, an attacker can craft a payload containing JavaScript code that is stored in the database associated with a gallery item. When this data is retrieved and rendered by the web server for display to visitors, the browser interprets it as executable script rather than plain text. This behavior violates fundamental security principles regarding the separation of code and data, allowing external input to be treated as part of the application's logic flow.
The operational impact of this vulnerability is severe due to its stored nature. An attacker with access to a user account that can create or edit gallery items, such as an author or contributor role in many WordPress configurations, can plant these malicious scripts permanently on the site. This leads to several critical consequences including session hijacking, where the attacker steals authentication cookies and gains unauthorized control over the victim's account. It also enables credential harvesting by redirecting users to phishing pages that mimic legitimate login portals. Furthermore, attackers may use this vector to deface websites by altering displayed content or distribute malware by forcing downloads of malicious files under the guise of legitimate gallery assets. The trust relationship between the website and its visitors is fundamentally broken, as any visitor loading a compromised page becomes an unwitting participant in the attack chain.
In terms of industry standard classifications, this vulnerability aligns with CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'). More specifically, it falls under CWE-836 which involves using password guessing or brute force to gain access if session fixation is facilitated by the XSS. From an offensive security perspective, such as the MITRE ATT&CK framework, this technique maps to T1059: Command and Scripting Interpreter, particularly JavaScript execution in a browser context. It also relates to T1204: User Execution, where the victim performs actions that lead to code execution, although here the trigger is passive viewing rather than active clicking of links. Understanding these mappings helps security professionals categorize the risk accurately within broader threat landscapes and compliance reporting frameworks like OWASP Top 10, specifically under A7: Cross-Site Scripting (XSS).
Mitigation strategies must address both immediate remediation and long-term defensive posture improvements. The primary solution is to upgrade Robo Gallery to a version newer than 5.1.6 where the vendor has presumably implemented proper input sanitization using functions like wp_kses or similar context-aware escaping mechanisms appropriate for HTML output. For sites unable to update immediately, manual code patches may be required if source access is available, focusing on filtering user-supplied data before database insertion and ensuring strict encoding during output rendering. Additionally, implementing a Content Security Policy (CSP) header can significantly mitigate the impact of successful XSS attacks by restricting the sources from which scripts are allowed to execute, thereby preventing inline script execution even if injection occurs. Regular security audits, static code analysis tools focused on web application vulnerabilities, and adherence to secure coding guidelines such as those provided by OWASP should be integrated into the development lifecycle to prevent similar flaws in future releases or other plugins used within the same environment.