CVE-2026-73184 in Global Gallery Plugin
Summary
by MITRE • 08/19/2026
Unauthenticated Cross Site Scripting (XSS) in Global Gallery <= 11.1.2 versions.
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Analysis
by VulDB Data Team • 08/19/2026
The vulnerability identified as an unauthenticated cross-site scripting flaw within the Global Gallery plugin for WordPress, specifically affecting versions up to and including 11.1.2, represents a significant security risk due to its lack of authentication requirements. This characteristic allows any remote attacker with network access to exploit the weakness without needing valid credentials or user interaction beyond visiting a crafted URL or triggering specific page loads. The core technical flaw stems from insufficient input validation and sanitization mechanisms within the application code that processes user-supplied data before rendering it in web pages. When malicious scripts are injected into these inputs, they execute in the context of the victim's browser session, leveraging the trust relationship between the browser and the vulnerable website to perform actions on behalf of the authenticated users or steal sensitive information such as cookies, session tokens, or personal data stored locally by the site.
From a technical perspective, this vulnerability aligns with Common Weakness Enumeration identifier CWE-79, which classifies improper neutralization of input during web page generation known as cross-site scripting. The attack vector typically involves injecting JavaScript code into fields that are reflected directly back to the user or stored in the database and later rendered without proper encoding. In the context of Global Gallery, this likely occurs within parameters controlling gallery display settings, search queries, or metadata inputs where special characters like angle brackets and quotation marks are not adequately escaped before being outputted by the server-side script. This failure allows attackers to bypass Content Security Policy directives if they are poorly configured, enabling more sophisticated attacks such as keylogging, session hijacking, or defacement of the website interface.
The operational impact of this vulnerability is severe because it compromises the confidentiality and integrity of user sessions associated with the WordPress site. Attackers can use the executed scripts to steal administrative cookies, potentially leading to full control over the WordPress dashboard if an administrator visits a malicious link crafted by the attacker. Furthermore, since the attack does not require authentication, the scope of potential victims is broad, encompassing any visitor or logged-in user who interacts with the affected gallery features. This can lead to data exfiltration, redirection to phishing sites, or the installation of malware on client machines through drive-by download techniques if combined with other browser vulnerabilities. The trust established by the domain allows these scripts to access local storage and perform AJAX requests that appear legitimate to security controls monitoring traffic from that origin.
Mitigation strategies must prioritize immediate remediation given the unauthenticated nature of the exploit. Site administrators should upgrade Global Gallery to a version later than 11.1.2 where this input validation issue has been resolved by the developers. If upgrading is not immediately feasible, temporary workarounds include implementing strict Content Security Policy headers that restrict script execution sources and disabling specific gallery features if they are not essential for business operations. Additionally, deploying Web Application Firewalls can help detect and block common XSS payloads in HTTP requests before they reach the application logic. Regular security audits and code reviews focusing on input handling and output encoding practices are recommended to prevent similar vulnerabilities from being introduced or persisting in other parts of the web application infrastructure aligned with OWASP Top 10 guidelines for injection prevention.