CVE-2026-66615 in Podlove Podcast Publisher Plugin
Summary
by MITRE • 08/20/2026
Unauthenticated Cross Site Scripting (XSS) in Podlove Podcast Publisher <= 4.5.4 versions.
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Analysis
by VulDB Data Team • 08/20/2026
The vulnerability identified as an unauthenticated cross-site scripting flaw within Podlove Podcast Publisher versions prior to or equal to 4.5.4 represents a significant security risk for websites utilizing this popular WordPress plugin. Cross-site scripting, commonly referred to as XSS, is a web security漏洞 that allows attackers to inject malicious scripts into web pages viewed by other users. In the specific context of this vulnerability, the lack of authentication requirements means that any individual with access to the public-facing portion of the website can exploit the flaw without needing valid credentials or prior authorization. This characteristic drastically lowers the barrier for entry, enabling a wide range of threat actors, including automated bots and script kiddies, to target vulnerable instances effectively.
The technical root cause typically involves insufficient sanitization or validation of user-supplied input before it is rendered in the browser environment. When a user interacts with specific features of the Podlove Podcast Publisher plugin, such as submitting comments, filling out contact forms, or manipulating query parameters, the application fails to properly escape special characters that have meaning in HTML and JavaScript contexts. Consequently, when the server processes this request and returns an HTTP response containing the unsanitized input within a web page, the browser interprets the injected code as legitimate script content rather than plain text. This execution context allows the malicious payload to run with the same privileges as the rest of the webpage, often operating under the domain's security policy which restricts access to sensitive cookies and local storage but still permits interaction with the Document Object Model.
The operational impact of this vulnerability is multifaceted and potentially severe depending on the sensitivity of the data hosted by the affected website. Attackers can leverage the executed script to steal session tokens, such as PHPSESSID or WordPress authentication cookies, thereby hijacking user sessions and gaining unauthorized access to administrative accounts if a victim with elevated privileges visits the compromised page. Furthermore, the vulnerability enables phishing attacks where attackers can inject fake login forms that mimic legitimate interfaces to harvest credentials from unsuspecting visitors. It also allows for defacement of the website content, redirection of users to malicious sites hosting malware or ransomware, and logging of keystrokes entered by other users on the same domain. Since Podlove is widely used in media and publishing sectors, compromising these sites can lead to reputational damage and loss of trust among the audience base.
From a classification perspective, this vulnerability aligns with CWE-79: Improper Neutralization of Input During Web Page Generation, commonly known as Cross-site Scripting (XSS). The unauthenticated nature of the exploit places it within the initial access phase of cyber attacks, specifically mapping to MITRE ATT&CK technique T1189 Drive-by Client Execution or potentially T1059 Command and Scripting Interpreter if the script performs further actions. Understanding these mappings helps security teams prioritize remediation efforts based on established industry frameworks that categorize risks by their potential for exploitation and impact.
Mitigation strategies must focus primarily on upgrading the Podlove Podcast Publisher plugin to a version greater than 4.5.4, where developers have implemented proper input validation and output encoding mechanisms. Input validation ensures that only expected data formats are accepted, while output encoding transforms special characters into safe HTML entities before rendering them in the browser context. Additionally, implementing Content Security Policy headers can provide an additional layer of defense by restricting the sources from which scripts can be loaded or executed, thereby mitigating the impact even if a vulnerability exists. Regular security audits and penetration testing should also be conducted to identify similar flaws across other plugins and themes integrated into the WordPress environment, ensuring a holistic approach to web application security.