CVE-2026-111888 in phpMyFAQ
Summary
by MITRE • 10/17/2026
phpMyFAQ from 4.0.0 before 4.1.9 contains an incorrect authorization vulnerability that allows delegated admins lacking the editnews right to modify news by calling PUT /admin/api/news/update, which checks NEWS_DELETE instead of NEWS_EDIT. Attackers holding addnews and delnews can read the update-news CSRF token from their own cookie and rewrite any news item's header, body, author, link and active flag shown on the public front page.
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Analysis
by VulDB Data Team • 10/17/2026
The vulnerability identified in phpMyFAQ versions prior to 4.1.9 represents a critical flaw in role-based access control logic within its REST API implementation. Specifically, the endpoint PUT /admin/api/news/update suffers from an incorrect authorization check that fails to enforce granular permissions correctly. The system is designed to restrict certain administrative actions based on specific rights assigned to delegated administrators. However, when processing requests to update news items, the backend code erroneously validates against the NEWS_DELETE permission rather than the required NEWS_EDIT permission. This logical error creates a significant discrepancy between the intended security policy and its actual enforcement mechanism.
This authorization bypass allows users with lower-level privileges to perform actions reserved for higher-privileged roles. An attacker who possesses only the addnews and delnews rights, which are typically less powerful than edit permissions in many content management systems, can exploit this flaw. By leveraging these existing but insufficiently restrictive credentials, an adversary gains the ability to modify news items that they should not be able to touch under normal circumstances. The vulnerability effectively elevates the capabilities of a delegated admin with delete and add rights to include update capabilities without requiring explicit edit permissions.
The operational impact of this flaw is substantial due to the nature of the data being manipulated. News items in phpMyFAQ are often displayed prominently on the public front page, serving as primary communication channels for organizations or communities using the platform. Successful exploitation allows an attacker to rewrite critical fields including the header, body text, author attribution, associated links, and the active status flag. This capability enables a range of malicious activities such as defacement, dissemination of misinformation, phishing via injected URLs, or disruption of service by deactivating important announcements. The integrity of public-facing content is compromised without requiring authentication bypasses beyond what was already granted to lower-privileged accounts.
Furthermore, the exploitation vector involves manipulating CSRF tokens associated with these API calls. Attackers can read their own session cookies to obtain valid update-news CSRF tokens and then use them to forge requests against other news items. This indicates a weakness in how cross-site request forgery protections are integrated with authorization checks. Even if CSRF protection is technically present, the underlying authorization logic remains flawed because it permits actions based on incorrect permission flags. The combination of token reuse and misconfigured access control means that authenticated users can arbitrarily alter public content as long they hold basic news management rights.
From a standards perspective, this vulnerability aligns with CWE-269 Improper Privilege Management, where the software does not properly assign privileges to actors based on their intended roles or permissions. It also relates closely to CWE-862 Missing Authorization, specifically in the context of API endpoints failing to verify that the user has the specific right required for the action being performed. In terms of attack patterns, this behavior mirrors techniques found in MITRE ATT&CK such as T1078 Valid Accounts and potentially T1534 Internal Spearphishing if used to manipulate internal communications or trust relationships through fake news updates.
Mitigation strategies must focus on correcting the underlying code logic immediately. The primary fix involves updating phpMyFAQ to version 4.1.9 or later, where this authorization check has been corrected to validate NEWS_EDIT instead of NEWS_DELETE for update operations. For organizations unable to patch immediately due to operational constraints, temporary mitigations should include restricting access to the /admin/api/news/update endpoint via web application firewall rules that enforce stricter IP-based restrictions if possible. Additionally, reviewing and tightening delegated admin roles is advisable; administrators should ensure that users with delnews rights do not unnecessarily possess addnews unless absolutely required for their specific workflow. Regular auditing of API logs can help detect any anomalous update patterns originating from accounts with limited privileges.