Security Alert Summary
The User Submitted Posts WordPress plugin contains a stored Cross-Site Scripting (XSS) vulnerability in versions before 20260608. A submitted value is not escaped before being output in an admin-configured display template, which can allow an attacker to store script content that is later executed in a users browser when a non-default display option is enabled. The issue can be triggered by unauthenticated users under the conditions described.
CVE Details
- CVE ID: CVE-2026-11570
- Affected component: User Submitted Posts (WordPress plugin)
- Affected versions: Versions less than 20260608 (before 20260608)
- Published: July 1, 2026 at 7:16:22 AM UTC
- Last modified: July 1, 2026 at 11:16:22 AM UTC
- CVSS v3.1 base score: 4.2
- CVSS v3.1 severity: MEDIUM
- CVSS v3.1 vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
- Authentication / privileges / user interaction: Authentication required: None; Privileges required: None; User interaction: Required
- Primary impact: Confidentiality: Low; Integrity: Low; Availability: None
- CWE / weakness ID: Not specified in provided data
Technical Details
The plugin fails to escape a user-submitted value before rendering it in an admin-configured display template. This results in a stored Cross-Site Scripting (XSS) vulnerability: an attacker can supply input that is stored by the plugin and later output verbatim into a page or template. The vulnerability is specifically triggered when a non-default display option is enabled in the plugins configuration.
Because the value is stored and later rendered without proper escaping, script code supplied by an attacker can execute in the context of users who view the affected output. The provided data does not name specific functions or REST API endpoints; the root cause described is the missing escaping on output in an admin-configured template.
The impact described in the CVE is limited to confidentiality and integrity (both assessed as low) and does not indicate availability impact. The exploitability characteristics show network attack vector, high complexity, no privileges required, and required user interaction.
How This Could Impact Your Website
Consider a typical small team: the site owner configures the plugin, an internal editor reviews submitted posts, and external contributors or anonymous visitors submit content. If the site uses a non-default display option mentioned in the report, an unauthenticated attacker could submit content that stores a script. When an editor or another user views the page or template that renders the stored value, the script could execute in that users browser.
Practical consequences include exposure of information visible to the affected page (for example, user-visible data or session-scoped information), and an increased risk of targeted phishing or social engineering if scripts can read or modify displayed content. The CVSS assessment indicates limited confidentiality and integrity impact rather than full site compromise.
If youre unsure whether your site is affected or how to assess your current user roles and plugins, it may be worth having a professional review.
Recommended Actions
- Update the affected plugin as soon as a patched version is available.
- Review and reduce unnecessary user roles, especially contributor-level accounts and anonymous posting options.
- Enforce strong passwords and enable two-factor authentication for editors and administrators.
- Remove unused or unmaintained plugins and disable unused display options in active plugins.
- Monitor site activity and logs for unusual behavior, including unexpected content submissions or changes to display templates.
If youd like help reviewing your plugins, user roles, or overall WordPress security posture, our team at Freshy is happy to help.
