CVE-2026-57699 in Slider Pro Plugin
Summary
by MITRE • 07/23/2026
Subscriber Cross Site Scripting (XSS) in Slider Pro <= 4.8.13 versions.
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Analysis
by VulDB Data Team • 07/23/2026
Cross site scripting vulnerabilities in slider pro plugins represent a significant security risk that can be exploited by malicious actors to execute arbitrary code within the context of a user's browser session. The vulnerability affects versions of the slider pro plugin up to and including version 4.8.13, where insufficient input validation and output sanitization allows attackers to inject malicious scripts into slider configurations that are then executed when legitimate users view affected pages. This particular vulnerability falls under the category of persistent cross site scripting as the malicious code is stored on the server and delivered to multiple users during subsequent page views.
The technical flaw stems from inadequate filtering of user-supplied data within the plugin's slider configuration parameters. When administrators or users input content into slider fields without proper sanitization, the system fails to escape special characters that could be interpreted as executable script code by web browsers. The vulnerability specifically occurs in how the plugin processes and renders slider data, where dynamic content is directly embedded into html output without appropriate context-aware encoding mechanisms. This weakness enables attackers to inject javascript payloads that can steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users.
The operational impact of this vulnerability extends beyond simple script execution as it can lead to complete compromise of user sessions and potential privilege escalation within the affected web application. An attacker who successfully exploits this vulnerability could hijack user accounts, modify slider content to display malicious advertisements, or use the compromised system as a launchpad for further attacks against other components within the same network. The persistent nature of the vulnerability means that once exploited, the malicious code continues to execute for all users until the plugin is updated or the vulnerable parameters are cleaned from the database. This makes the vulnerability particularly dangerous in environments where multiple administrators may be using the slider plugin and where automatic updates are not implemented.
Mitigation strategies for this vulnerability require immediate patching of the slider pro plugin to version 4.8.14 or later, which includes proper input validation and output sanitization measures. Organizations should implement comprehensive input filtering mechanisms that validate all user-supplied data against known safe character sets and employ context-aware output encoding before rendering any dynamic content. The implementation of content security policies can provide additional protection layers by restricting the sources from which scripts can be loaded and executed within affected web applications. Regular security audits and vulnerability assessments should be conducted to identify similar issues in other plugins and themes that may exhibit comparable weaknesses in input handling and output rendering processes.
This vulnerability aligns with CWE-79 which specifically addresses cross site scripting flaws in web applications, and corresponds to attack techniques described in the attack pattern catalog under the category of script injection attacks. The threat model indicates this vulnerability could be exploited through social engineering tactics where attackers convince administrators to input malicious content into slider fields, or through automated scanning tools that identify vulnerable plugin versions. Security practitioners should consider implementing web application firewalls with specific rules targeting known XSS patterns and establish monitoring procedures for unusual activity related to slider configuration updates or content modifications. Regular patch management processes must be enforced to ensure timely deployment of security updates across all web applications utilizing vulnerable components.