CVE-2026-57783 in Speaker Plugin
Summary
by MITRE • 07/13/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in merkulove Speaker speaker allows Stored XSS.This issue affects Speaker: from n/a through <= 4.1.13.
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Analysis
by VulDB Data Team • 07/13/2026
Cross-site scripting vulnerabilities represent one of the most prevalent and dangerous web application security flaws, with the potential to compromise user sessions and execute malicious code within victim browsers. This particular vulnerability exists within the merkulove Speaker plugin where improper input sanitization during web page generation creates an opportunity for attackers to inject malicious scripts that persist in the application's database. The stored nature of this cross-site scripting vulnerability means that once malicious input is submitted and saved, it will be executed every time affected pages are loaded by other users who visit those pages.
The technical flaw stems from inadequate validation and sanitization of user-supplied data before rendering it within web page content. When users submit content through the Speaker plugin interface, the application fails to properly escape or filter potentially malicious input such as javascript code, html tags, or other script elements. This allows attackers to inject persistent scripts that get stored in the database and subsequently executed whenever legitimate users access pages containing this compromised data. The vulnerability impacts versions from n/a through 4.1.13 of the Speaker plugin, indicating a widespread issue affecting multiple releases within this version range.
The operational impact of this stored XSS vulnerability extends beyond simple script execution, potentially enabling attackers to steal session cookies, perform unauthorized actions on behalf of users, redirect victims to malicious sites, or even harvest sensitive information from user interactions with the compromised application. Attackers can leverage this vulnerability to establish persistent footholds within systems where the plugin is deployed, particularly in environments where administrators or users have elevated privileges. The stored nature of the vulnerability means that once exploited, the malicious payload remains active until manually removed from the database, providing attackers with extended periods of access and potential data exfiltration capabilities.
Security practitioners should immediately implement input validation and output encoding mechanisms to prevent malicious content from being stored or executed within the application. This includes implementing proper sanitization routines that strip or encode potentially dangerous characters and tags before storing user input. The CWE community has identified this as a classic cross-site scripting vulnerability under CWE-79, which specifically addresses improper neutralization of input during web page generation. From an ATT&CK framework perspective, this vulnerability maps to T1059.005 for command and script injection techniques, representing a critical entry point for attackers seeking to compromise user sessions and execute arbitrary code within the victim environment. Organizations should also consider implementing Content Security Policy headers as an additional defense-in-depth measure to mitigate the impact of any successful XSS attacks that may still occur despite input validation efforts.
Patch management represents the most effective immediate mitigation strategy, with developers releasing updated versions that properly sanitize and validate all user-supplied input before storage and rendering. System administrators should prioritize updating to patched versions as soon as possible while maintaining vigilant monitoring for potential exploitation attempts. Additionally, implementing web application firewalls and intrusion detection systems can help detect and block known malicious payloads attempting to exploit this vulnerability. Regular security assessments and code reviews focusing on input validation practices will further reduce the risk of similar vulnerabilities being introduced in future development cycles. The remediation process should also include thorough database audits to identify any previously injected malicious content that may have been stored during the vulnerable period.