CVE-2026-116849 in StreamCast Plugin
Summary
by MITRE • 10/29/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in bPlugins StreamCast streamcast allows Stored XSS.This issue affects StreamCast: from n/a through 2.4.6.
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Analysis
by VulDB Data Team • 10/29/2026
The identified vulnerability represents a classic instance of Improper Neutralization of Input During Web Page Generation, commonly known as Cross-Site Scripting or XSS. Specifically, this is classified as a Stored XSS flaw within the bPlugins StreamCast application, affecting versions from n/a through 2.4.6. Unlike reflected XSS attacks where malicious scripts are executed immediately via a crafted link, stored vulnerabilities involve the persistence of malicious input on the target server. In the context of StreamCast, which functions as an audio streaming and podcasting platform, this flaw likely resides in areas where user-generated content or administrative inputs are processed without adequate sanitization before being rendered to other users' browsers. This architectural weakness allows attackers to inject executable JavaScript code that becomes permanently stored within the application's database or file storage mechanisms.
From a technical perspective, the core issue lies in the failure of the input validation and output encoding routines inherent to the StreamCast software. When data is submitted by an authenticated user or administrator, such as podcast titles, episode descriptions, comments, or metadata fields, the system fails to properly neutralize special characters that have semantic meaning in HTML and JavaScript contexts. Consequently, when another user accesses a page containing this malicious payload, their browser interprets the injected script not as plain text but as executable code. This execution occurs within the security context of the StreamCast domain, granting the attacker significant leverage over the victim's session state and interaction with the application interface.
The operational impact of this vulnerability is severe due to its persistent nature. Once a malicious payload is stored, it will be served to every user who views the affected content until the data is manually removed or the vulnerable version is patched. This creates a high-impact attack vector for credential theft, session hijacking, and defacement. Attackers can craft payloads that exfiltrate authentication cookies, session tokens, or other sensitive identifiers to an external server controlled by the adversary. Furthermore, because StreamCast often involves community engagement through comments and interactions, attackers could deploy phishing pages disguised as legitimate login forms within the application context, tricking users into surrendering their credentials. The persistence of the attack means that remediation requires not only patching the software but also auditing databases for previously injected malicious scripts to prevent ongoing compromise of subsequent visitors.
In terms of industry-standard classifications, this vulnerability aligns with CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'). The specific variant is Stored XSS, which corresponds to sub-category CWE-80 in many detailed taxonomies. From a tactical perspective within the MITRE ATT&CK framework, this flaw facilitates several techniques including Credential Access via Browser Session Hijacking (T1539), Collection of Input Data through Keylogging or Screen Capture if elevated privileges are achieved, and potentially Phishing for Information (T1566). The ability to execute arbitrary code in a trusted context effectively bypasses many client-side security controls such as Content Security Policy headers if not strictly configured, although CSP can mitigate the impact by restricting script sources.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. The primary solution is to upgrade StreamCast to version 2.4.7 or later where this input validation flaw has been corrected. For organizations unable to immediately patch, implementing a Web Application Firewall (WAF) with rulesets tuned for XSS detection can provide a layer of defense by blocking requests containing known malicious patterns in input fields. Additionally, developers should enforce strict output encoding based on the context in which data is rendered, ensuring that special characters are converted into their corresponding HTML entities before being written to the DOM. Input validation should also be implemented using allow-lists rather than deny-lists to ensure only expected character sets and formats are accepted. Regular security audits and penetration testing focusing on stored payload injection points will help identify similar weaknesses in other modules of the application ecosystem.