CVE-2025-53276 Overview
CVE-2025-53276 is a DOM-based Cross-Site Scripting (XSS) vulnerability in the Omnipress WordPress plugin developed by omnipressteam. The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. Affected versions include Omnipress up to and including 1.6.4. An attacker can craft malicious input that executes JavaScript in a victim's browser when the plugin renders the manipulated content. Exploitation requires low-privileged authentication and user interaction, but the scope-changed impact allows the injected script to affect resources beyond the vulnerable component.
Critical Impact
Authenticated attackers can inject client-side scripts that execute in the browser context of site visitors and administrators, enabling session theft, phishing, and unauthorized actions within the WordPress environment.
Affected Products
- Omnipress WordPress plugin versions n/a through 1.6.4
- WordPress sites running the vulnerable Omnipress plugin
- Browsers rendering pages generated by the affected plugin
Discovery Timeline
- 2025-06-27 - CVE-2025-53276 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-53276
Vulnerability Analysis
The vulnerability is a DOM-based XSS flaw classified under [CWE-79]. It occurs when the Omnipress plugin writes attacker-controlled data into the Document Object Model without adequate sanitization or encoding. Unlike reflected or stored XSS, the malicious payload is processed entirely within the client-side JavaScript, meaning the server may never observe the exploit string. When an authenticated user with low privileges submits crafted input, and a victim subsequently loads a page that processes that input in the browser, the payload executes with the site's origin. This allows the attacker to read cookies, exfiltrate session data, or perform state-changing requests on behalf of the victim.
Root Cause
The root cause is missing or insufficient output encoding when the plugin's JavaScript writes user-controlled values into DOM sinks such as innerHTML, document.write, or attribute setters. Input arriving from URL fragments, query parameters, or plugin-managed fields flows directly into rendering logic without being treated as untrusted data. Refer to the Patchstack Vulnerability Advisory for the vendor-referenced technical details.
Attack Vector
Exploitation occurs over the network and requires an authenticated attacker with contributor-level or comparable privileges. The attacker plants a malicious payload through a plugin-controlled input field or crafted link. A victim, typically an administrator or another site user, must interact with the affected content to trigger execution. Because the vulnerability has a changed scope, the injected script can influence resources beyond the plugin itself, including the surrounding WordPress admin interface.
No verified proof-of-concept code is publicly available. See the Patchstack Vulnerability Advisory for further technical context.
Detection Methods for CVE-2025-53276
Indicators of Compromise
- Unexpected <script> tags, event handlers, or javascript: URIs embedded in content managed by the Omnipress plugin.
- Outbound browser requests from administrator sessions to unfamiliar third-party domains shortly after visiting plugin-rendered pages.
- New or modified WordPress user accounts, plugin installations, or option changes made without a corresponding administrator action.
Detection Strategies
- Inspect Omnipress plugin content and post metadata for HTML or JavaScript payloads that should not be present in editorial fields.
- Review web server access logs for requests containing encoded XSS payloads targeting Omnipress endpoints or query strings.
- Deploy a web application firewall ruleset that flags common DOM-XSS payload patterns aimed at WordPress plugins.
Monitoring Recommendations
- Enable Content Security Policy (CSP) reporting to capture script execution attempts that violate the site's policy.
- Monitor WordPress audit logs for privilege changes, plugin activations, and configuration edits performed by non-administrative accounts.
- Alert on administrator browser sessions that generate anomalous outbound traffic patterns immediately after loading plugin pages.
How to Mitigate CVE-2025-53276
Immediate Actions Required
- Update the Omnipress plugin to a version later than 1.6.4 as soon as the vendor publishes a fixed release.
- Audit existing plugin-managed content for injected scripts or suspicious HTML introduced before the patch was applied.
- Restrict contributor and author account creation and review recent low-privileged account activity for signs of abuse.
Patch Information
The vulnerability affects Omnipress versions through 1.6.4. Consult the Patchstack Vulnerability Advisory for current fix availability and upgrade guidance. Apply the vendor-provided update in a staging environment first, then promote to production after validation.
Workarounds
- Deactivate and remove the Omnipress plugin until a patched release is available if it is not business-critical.
- Enforce a strict Content Security Policy that disallows inline scripts and untrusted script sources to limit XSS execution.
- Limit contributor-tier account provisioning and require multi-factor authentication for all WordPress users with content editing rights.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
