CVE-2025-5529 Overview
CVE-2025-5529 is a Stored Cross-Site Scripting (XSS) vulnerability in the Educenter theme for WordPress. The flaw affects all versions up to and including 1.6.2 and resides in the Circle Counter Block. Insufficient input sanitization and output escaping allow authenticated users with Contributor-level access or above to inject arbitrary JavaScript into pages. Injected scripts execute in the browser of any user who visits the affected page, enabling session theft, redirection, or unauthorized administrative actions. The issue is tracked under CWE-79.
Critical Impact
Authenticated contributors can inject persistent JavaScript that executes against every visitor of an affected page, including site administrators.
Affected Products
- Educenter WordPress theme, all versions up to and including 1.6.2
- WordPress installations exposing Contributor-level or higher accounts
- Sites rendering the Circle Counter Block in published content
Discovery Timeline
- 2025-07-26 - CVE-2025-5529 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-5529
Vulnerability Analysis
The vulnerability exists in the Circle Counter Block implementation shipped with the Educenter theme. The block accepts user-controlled block attributes and renders them directly into page output without escaping. Because rendered output executes inside the DOM of any visitor, injected scripts run under the origin of the WordPress site. An attacker with contributor privileges can craft a page containing malicious payloads that persist until the page is edited or removed.
The attack requires authentication but no user interaction beyond a visitor loading the page. When a site administrator accesses the injected content, the payload executes with the administrator's session context, enabling account takeover or plugin-level configuration changes.
Root Cause
The root cause is missing input sanitization and missing output escaping in the Circle Counter Block render path. The affected code is visible in the WordPress Circle Counter Code. WordPress provides helpers such as esc_html(), esc_attr(), and wp_kses_post() for exactly this purpose, but the vulnerable block outputs attribute data without applying them.
Attack Vector
The attack path is network-based and requires contributor credentials. An attacker authenticates to wp-admin, creates or edits a post containing the Circle Counter Block, and populates the block attributes with a JavaScript payload. When any user loads the resulting page, the browser parses and executes the injected script. Because the scope is Changed (S:C), the payload can affect resources beyond the vulnerable component, including administrator sessions and browser storage for the WordPress origin.
No verified public exploit code has been published. See the Wordfence Vulnerability Report for technical details on the injection surface.
Detection Methods for CVE-2025-5529
Indicators of Compromise
- Circle Counter Block instances containing HTML tags such as <script>, <img onerror=>, or <svg onload=> in block attributes
- Post revisions authored by contributor accounts that add or modify Circle Counter Blocks
- Outbound HTTP requests from visitor browsers to unfamiliar domains referenced by post content
Detection Strategies
- Query the wp_posts table for post_content containing the Circle Counter Block marker together with <script, javascript:, or event handler attributes
- Review WordPress audit logs for contributor accounts creating or editing pages that use the Circle Counter Block
- Deploy a web application firewall rule that inspects block editor payloads for script tags submitted by non-administrator roles
Monitoring Recommendations
- Alert on new or modified pages authored by Contributor and Author roles that reference circle-counter block metadata
- Monitor administrator sessions for anomalous XHR or fetch requests originating from page loads
- Track Content Security Policy (CSP) violation reports for inline script executions on public pages
How to Mitigate CVE-2025-5529
Immediate Actions Required
- Update the Educenter theme to a version later than 1.6.2 once the vendor publishes a fixed release
- Audit all Contributor-level and Author-level accounts and disable any that are unused or unrecognized
- Review published pages that include the Circle Counter Block and remove any suspicious block attributes
Patch Information
The vendor's fix is tracked in the WordPress Changeset Log for the Educenter theme. Site owners should apply the theme update through the WordPress admin dashboard under Appearance > Themes and verify the installed version is above 1.6.2 after upgrade.
Workarounds
- Restrict Contributor and Author role assignments to trusted users until the theme is patched
- Deploy a strict Content Security Policy that disallows inline scripts on public-facing pages
- Temporarily disable the Circle Counter Block or switch to an unaffected theme until a fixed version is installed
# Verify installed Educenter theme version via WP-CLI
wp theme get educenter --field=version
# List users with Contributor or Author roles for review
wp user list --role=contributor --fields=ID,user_login,user_email
wp user list --role=author --fields=ID,user_login,user_email
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
