CVE-2026-115613 in Image Gallery Block Plugin
Summary
by MITRE • 10/26/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in bPlugins Image Gallery block – Create and display photo gallery/photo album. 3d-image-gallery allows Stored XSS.This issue affects Image Gallery block – Create and display photo gallery/photo album.: from n/a through 2.4.1.
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Analysis
by VulDB Data Team • 10/26/2026
The identified vulnerability represents a classic instance of Cross-site Scripting, specifically categorized under CWE-79 in the Common Weakness Enumeration framework. This flaw resides within the bPlugins Image Gallery block for WordPress, which is designed to allow users to create and display photo galleries or albums. The specific manifestation involves stored cross-site scripting, meaning that malicious script payloads are not merely executed during a single session but are permanently saved on the target server, typically within the application's database or file storage associated with gallery metadata. This distinguishes it from reflected XSS attacks, as the vulnerability persists and affects every user who views the compromised content, significantly amplifying the potential blast radius of an exploitation attempt.
The technical root cause lies in improper neutralization of input during web page generation. When a user creates a new photo album or modifies gallery settings through the plugin's interface, the application fails to adequately sanitize special characters such as angle brackets, quotes, and ampersands before processing them for storage. Consequently, when an attacker injects malicious JavaScript code into fields intended for plain text input—such as image titles, descriptions, or alt tags—the server accepts this data without validation. Upon subsequent rendering of the gallery page by any visitor's browser, the stored script is executed in the context of the victim’s session. This behavior aligns with MITRE ATT&CK technique T1059.007, which covers JavaScript execution within web browsers, allowing attackers to leverage legitimate application functionality for malicious purposes.
The operational impact of this vulnerability extends beyond simple defacement or nuisance alerts. Because the script executes in the context of the victim’s browser session with the same privileges as trusted content, an attacker can perform a variety of hostile actions. These include stealing sensitive cookies and authentication tokens, thereby facilitating account takeover attacks against administrators or other users who view the infected gallery. Furthermore, attackers may redirect victims to phishing sites designed to harvest credentials, manipulate page DOM elements to alter visual presentation for social engineering purposes, or even initiate requests on behalf of the victim if session fixation techniques are employed. The persistence of stored XSS means that a single successful injection can compromise numerous visitors over an extended period until the malicious content is manually removed from the database.
Mitigation strategies must address both immediate remediation and long-term defensive posture. For administrators currently running versions 2.4.1 or earlier, the most critical step is to update the bPlugins Image Gallery block to a patched version where input sanitization has been properly implemented. If an upgrade is not immediately feasible, temporary mitigation involves manually auditing existing galleries for suspicious script tags and removing them from the database entries associated with image metadata. Additionally, implementing Content Security Policy headers can help mitigate the impact by restricting the sources from which scripts are allowed to execute, although this should be viewed as a compensating control rather than a primary fix. Developers must ensure that all user-supplied data is strictly validated against an allowlist of safe characters and encoded appropriately for its context before being rendered in HTML output, thereby neutralizing any attempt at script injection during the web page generation phase.