CVE-2026-14929 in JS Help Desk Plugin
Summary
by MITRE • 07/31/2026
The JS Help Desk WordPress plugin before 3.1.4 does not verify ownership of the targeted reply before updating it, allowing any authenticated user (Subscriber and above) to overwrite the content of any support-ticket reply on the site.
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Analysis
by VulDB Data Team • 07/31/2026
The JS Help Desk WordPress plugin vulnerability represents a critical access control flaw that undermines the security of support ticket systems relying on this plugin. This issue affects versions prior to 314 and stems from insufficient validation mechanisms within the plugin's reply update functionality. The flaw allows any authenticated user with Subscriber role or higher privileges to manipulate support ticket responses, effectively bypassing the intended authorization controls that should restrict reply modifications to legitimate ticket owners or administrators.
This vulnerability operates through a fundamental failure in input validation and access control verification. When users attempt to update replies within the help desk system, the plugin fails to cross-reference the current user's permissions against the ownership of the target reply. The absence of proper ownership checks creates an arbitrary write vulnerability that enables privilege escalation through unauthorized modifications. Attackers can exploit this weakness by crafting requests that target specific reply identifiers belonging to other users' support tickets, effectively overwriting their content with malicious or misleading information.
The operational impact of this vulnerability extends beyond simple data modification, potentially enabling several attack vectors within the help desk environment. An authenticated attacker could use this flaw to deface support ticket responses, inject malicious content, or manipulate evidence within support workflows. This capability undermines the integrity of support ticket histories and can compromise the trustworthiness of the entire support system. The vulnerability particularly affects organizations that rely on detailed support ticket trails for compliance purposes, as unauthorized modifications could obscure audit trails and compromise forensic investigations.
From a cybersecurity perspective, this vulnerability aligns with CWE-285, which addresses improper authorization issues in software systems. The flaw demonstrates poor implementation of access control mechanisms where the system fails to verify that the requesting entity has proper authorization to modify specific resources. It also relates to ATT&CK technique T1078 which covers valid accounts and privilege escalation through unauthorized modifications to system components. Organizations using this plugin may find their support ticket integrity compromised, potentially leading to data corruption, information disclosure, or system manipulation that could affect customer trust and operational continuity.
The recommended mitigation strategy involves immediate upgrading to JS Help Desk plugin version 314 or later, which addresses the ownership verification issue through proper access control implementation. Administrators should also review existing user permissions and consider implementing additional monitoring for reply modifications within help desk systems. Regular security audits of WordPress plugins should include verification of access control mechanisms, particularly for components handling sensitive user data or system modifications. Organizations may need to implement automated alerting for unauthorized reply modifications and conduct periodic reviews of support ticket integrity to detect potential exploitation attempts.