CVE-2026-113409 in Ortto Plugin
Summary
by MITRE • 10/29/2026
The Ortto plugin for WordPress before 1.0.25 did not escape stored settings on its admin settings page, leading to stored cross-site scripting. A threat actor able to modify the plugin's configuration could execute arbitrary JavaScript in an administrator's session when they visited the impacted page.
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Analysis
by VulDB Data Team • 10/29/2026
The vulnerability identified within the Ortto WordPress plugin prior to version 1.0.25 represents a classic instance of Stored Cross-Site Scripting, technically categorized under CWE-79: Improper Neutralization of Input During Web Page Generation. This flaw stems from an insufficient validation and sanitization mechanism applied when storing configuration data in the database and subsequently rendering it on the administrative settings page without proper encoding. When an attacker with the ability to modify plugin configurations injects malicious script payloads, these inputs are persisted server-side rather than being executed immediately upon entry. Consequently, every time a privileged user accesses the specific admin interface where this unescaped content is displayed, the browser interprets the injected code as legitimate JavaScript belonging to the page context.
From an operational perspective, this vulnerability poses significant risks due to its persistent nature and high privilege level of affected users. The attack vector requires initial access to modify plugin settings, which typically necessitates administrative or editor-level credentials in a WordPress environment. Once such access is obtained, the threat actor can embed arbitrary JavaScript that executes automatically upon page load for any administrator visiting the configuration screen. This execution context allows the malicious script to interact with the Document Object Model of the admin dashboard, potentially stealing session cookies, capturing authentication tokens, performing actions on behalf of the victim user, or redirecting the administrator to phishing sites designed to harvest further credentials. The impact is severe because it effectively bypasses same-origin policies for administrative functions, granting the attacker full control over the WordPress administration interface during the victim's active session.
In terms of threat modeling and industry frameworks, this vulnerability aligns with MITRE ATT&CK technique T1059: Command and Scripting Interpreter, specifically within the context of web-based attacks where scripts are used to automate malicious activities or exfiltrate data from the compromised environment. The persistence aspect also relates to techniques involving stored payloads that remain active until manually removed by an administrator who may not be aware of the compromise. Security researchers emphasize that such flaws often arise from developers assuming that administrative interfaces are safe spaces for input, neglecting the principle of least privilege and strict output encoding even in backend-facing pages where trust boundaries might be misjudged.
To mitigate this vulnerability, immediate action is required to upgrade the Ortto plugin to version 1.0.25 or later, which implements proper escaping functions such as esc_html or wp_kses_post when rendering user-supplied data on admin screens. For organizations unable to patch immediately due to compatibility constraints, temporary mitigations include restricting access to WordPress administrative pages through IP whitelisting and enforcing multi-factor authentication for all administrator accounts to reduce the window of opportunity if session hijacking occurs. Additionally, implementing a Content Security Policy header with strict directives can help mitigate the impact by preventing the execution of inline scripts unless explicitly allowed, although this must be configured carefully to avoid breaking legitimate plugin functionality. Regular security audits focusing on input validation and output encoding practices across all custom plugins are essential to prevent similar vulnerabilities in future development cycles.