CVE-2026-58591 in Colorbox
Summary
by MITRE • 07/11/2026
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Colorbox allows Cross-Site Scripting (XSS). This issue affects Colorbox versions: from 0.0.0 to 2.1.5, from 0.0.0 to 2.2.0.
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Analysis
by VulDB Data Team • 07/11/2026
The vulnerability under discussion represents a classic cross-site scripting flaw that has been identified in the Drupal Colorbox module, specifically affecting versions within the ranges of 0.0.0 to 2.1.5 and 0.0.0 to 2.2.0. This issue falls squarely under the purview of CWE-79 which defines cross-site scripting as a weakness where untrusted data is incorporated into web page content without proper sanitization or escaping mechanisms. The vulnerability manifests when the Colorbox module fails to adequately neutralize user-supplied input during the generation of web pages, creating an avenue for malicious actors to inject client-side scripts that execute in the context of other users' browsers.
The technical exploitation of this vulnerability occurs through the improper handling of input parameters within the Colorbox module's web page generation process. When users submit content or interact with elements that are processed by Colorbox, the module does not sufficiently sanitize or escape special characters that could be interpreted as HTML or JavaScript code. This failure allows attackers to craft malicious payloads that, when rendered by the victim's browser, execute unintended commands. The vulnerability is particularly concerning because Colorbox is commonly used for displaying images, videos, and other media in Drupal-based websites, making it a prime target for exploitation in web applications that rely on this functionality.
From an operational perspective, the impact of this XSS vulnerability extends beyond simple script execution to potentially compromise entire user sessions and sensitive data. Attackers can leverage this weakness to steal session cookies, perform unauthorized actions on behalf of users, redirect victims to malicious sites, or even deface websites by injecting persistent scripts that modify page content. The attack surface is broad since Colorbox is frequently integrated into various Drupal modules and themes, meaning that a single vulnerable component could affect multiple website functionalities. This type of vulnerability aligns with ATT&CK technique T1059 which covers command and scripting interpreter tactics, specifically targeting the execution of malicious scripts within user browsers.
The remediation approach for this vulnerability requires immediate attention through version updates to patched releases of the Colorbox module. Organizations should prioritize upgrading to versions that have implemented proper input sanitization measures, ensuring that all user-supplied data is appropriately escaped before being rendered in web pages. Additionally, implementing content security policies can provide an additional layer of defense by restricting the sources from which scripts can be loaded and executed within browser contexts. Security headers such as X-Content-Type-Options and X-Frame-Options should also be configured properly to mitigate potential exploitation vectors. Regular security audits of Drupal installations, including comprehensive vulnerability scanning and code review processes, are essential to identify and remediate similar weaknesses in other modules or custom implementations that may present analogous risks.