CVE-2026-110981 in Photo Album Plus Plugin
Summary
by MITRE • 10/18/2026
The WP Photo Album Plus WordPress plugin before 9.2.11.002 does not properly escape a category navigation value before reflecting it into a JavaScript event handler on its gallery breadcrumb links, allowing unauthenticated attackers to inject arbitrary script that executes in the browser of anyone who follows a crafted gallery link and clicks the breadcrumb, including a logged-in administrator.
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Analysis
by VulDB Data Team • 10/18/2026
The vulnerability identified in WP Photo Album Plus prior to version 9.2.11.002 represents a significant security flaw rooted in improper input validation and output encoding within the plugin's category navigation logic. This specific issue is classified as an Unsanitized Input reflected into JavaScript, which aligns with CWE-79, commonly known as Cross-Site Scripting or XSS. The core technical failure occurs when the application processes category names for gallery breadcrumb links without adequately sanitizing special characters that hold meaning in a JavaScript context. Instead of encoding these values to ensure they are treated strictly as data rather than executable code, the plugin directly embeds user-supplied input into event handlers associated with navigation elements. This architectural oversight allows an attacker to inject malicious script payloads by crafting URLs where the category parameter contains encoded or obfuscated JavaScript commands.
From a technical perspective, the exploitation vector relies on the reflection of this unsanitized data back into the browser environment when a user interacts with the gallery interface. Specifically, clicking on breadcrumb links triggers event handlers that execute the embedded content. Because the input is not properly escaped, any script contained within the category name is interpreted and executed by the victim's web browser as part of the page's dynamic behavior. This mechanism bypasses standard security controls because the malicious code originates from a trusted domain, leveraging the trust relationship between the user and the website to execute arbitrary commands in the context of the site’s origin.
The operational impact of this vulnerability is severe due to its potential for affecting both unauthenticated visitors and authenticated administrators. While any visitor can be targeted by following a crafted link, the ability to exploit this flaw as an administrator poses a critical risk to the entire WordPress installation. An attacker who successfully exploits this vulnerability against an admin user can perform actions with elevated privileges, such as modifying site settings, creating new administrative accounts, or accessing sensitive data stored within the database. This effectively compromises the confidentiality, integrity, and availability of the web application and its underlying infrastructure. The attack is particularly insidious because it requires only social engineering to lure a victim into clicking a link, making it an effective vector for targeted attacks against site owners.
In terms of industry frameworks, this vulnerability maps directly to MITRE ATT&CK technique T1059, specifically the execution of JavaScript via browser-based interactions. It also relates to initial access vectors where attackers use crafted links to gain footholds in web applications. The lack of proper output encoding places it squarely within the OWASP Top 10 category for Injection vulnerabilities, highlighting a failure to implement secure coding practices regarding data handling and rendering.
To mitigate this vulnerability, immediate action is required by updating WP Photo Album Plus to version 9.2.11.002 or later, where these input validation and output encoding issues have been addressed. Developers should ensure that all dynamic content inserted into JavaScript contexts undergoes rigorous escaping using appropriate libraries or functions designed for the specific scripting language involved. Implementing Content Security Policy headers can also provide an additional layer of defense by restricting the sources from which scripts are allowed to execute, thereby limiting the impact even if a similar vulnerability were present in other parts of the application. Regular security audits and code reviews focusing on input sanitization practices are essential for maintaining long-term resilience against such injection-based attacks.