CVE-2026-94264
UnknownSummary
The Advanced Custom Fields: Extended WordPress plugin (and PRO) before 0.9.2.8 does not validate or escape some form shortcode attributes that can take values from the visitor's request and are output without escaping. This allows users with a role as low as contributor to run arbitrary script in the browser of anyone led to open a crafted link or page, including a logged-in administrator. This is an incomplete fix for CVE-2023-5292.
Risk Assessment
An XSS attack targeting an administrator is possible, potentially leading to session hijacking and further site compromise. It requires victim interaction with a link or page.
Recommendation
Update the Advanced Custom Fields: Extended (and PRO) plugin to version 0.9.2.8 or later. Review form shortcode usage for attributes sourced from user requests.
Other vulnerabilities in Advanced Custom Fields: Extended WordPress plugin
See all- CVE-2026-94268Unknown
The Advanced Custom Fields: Extended WordPress plugin (and PRO) before 0.9.2.8 does not consistently resolve the target of the update-user action between authorization and execution in its front-end Forms module. This allows unauthenticated visitors to bypass the guard protecting administrator accounts, take over the site administrator's account, and obtain a valid session. Exploitation requires two separate front-end form configurations whose targets are mapped to visitor-submitted values.
- CVE-2026-94267Unknown
The Advanced Custom Fields: Extended WordPress plugin (and PRO) before 0.9.2.8 performs no capability check when updating a post through one of its front-end form actions. This allows unauthenticated visitors to overwrite arbitrary posts, including those storing field definitions, leading to arbitrary code execution on the server. Exploitation requires a published form whose post-update action maps both target and content to visitor-submitted values.
- CVE-2026-94262Unknown
The Advanced Custom Fields: Extended WordPress plugin (and PRO) before 0.9.2.8 does not verify that the requester is authorized to edit the targeted user account in the update-user action of its front-end Forms module, performing that check only for administrator accounts. This allows unauthenticated visitors to overwrite any non-administrator account's credentials and obtain a session for that account. Exploitation requires a published form whose user-update action maps its target to a visitor-submitted value.
Original NVD description (English source)
The Advanced Custom Fields: Extended WordPress plugin before 0.9.2.8, Advanced Custom Fields: Extended PRO WordPress plugin before 0.9.2.8 does not validate or escape some of its form shortcode attributes, which can be pointed at values taken from the visitor's own request and are then output without escaping, allowing users with a role as low as contributor to have arbitrary script run in the browser of anyone led to open a crafted link or page, including a logged-in administrator. This is an incomplete fix for CVE-2023-5292, whose deny-list covers only the three HTML wrapper attributes.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS