CVE-2025-31572 Overview
CVE-2025-31572 is a Cross-Site Request Forgery (CSRF) vulnerability in the dragon-calendar-free-version WordPress plugin, known as Multi Days Events and Multi Events in One Day Calendar by v20202020. The flaw affects all versions from initial release through 1.1.3. An attacker can trick an authenticated user into submitting a forged request that performs unauthorized state-changing actions on the WordPress site. The vulnerability is tracked as CWE-352 and requires user interaction, typically by luring a victim to a malicious page or link.
Critical Impact
Successful exploitation permits unauthorized modification of plugin-controlled data on behalf of an authenticated WordPress user through a crafted request.
Affected Products
- WordPress Plugin: Multi Days Events and Multi Events in One Day Calendar (dragon-calendar-free-version)
- Vendor: v20202020
- Versions: All releases up to and including 1.1.3
Discovery Timeline
- 2025-03-31 - CVE-2025-31572 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-31572
Vulnerability Analysis
The plugin fails to validate the origin and authenticity of state-changing HTTP requests. WordPress plugins are expected to implement nonce verification through wp_verify_nonce() or check_admin_referer() for privileged operations. The dragon-calendar-free-version plugin lacks these controls on one or more request handlers through version 1.1.3. An attacker who convinces an authenticated user to visit an attacker-controlled page can trigger requests that execute with the victim's session cookies. The scope of impact is limited to integrity, with no direct confidentiality or availability loss reported.
Root Cause
The root cause is missing CSRF token validation on plugin request handlers. Without a per-session nonce tied to the requesting user, the plugin accepts cross-origin requests as legitimate. This maps directly to CWE-352: Cross-Site Request Forgery.
Attack Vector
An attacker crafts a malicious HTML page containing an auto-submitting form or image tag that targets a vulnerable plugin endpoint on a WordPress site running the affected version. When an authenticated WordPress user, typically an administrator, loads the attacker-controlled page, the browser sends the forged request with valid authentication cookies. The plugin processes the request without verifying user intent. Exploitation requires user interaction, aligning with the reported attack profile documented in the Patchstack Vulnerability Report.
No verified proof-of-concept code is publicly available. The vulnerability follows the standard CSRF pattern documented for WordPress plugins missing nonce verification.
Detection Methods for CVE-2025-31572
Indicators of Compromise
- Unexpected calendar event entries, edits, or deletions in the WordPress database wp_posts table associated with the plugin.
- HTTP POST requests to plugin endpoints containing Referer headers pointing to third-party domains.
- Administrator sessions generating plugin state changes without corresponding admin panel navigation in access logs.
Detection Strategies
- Review web server access logs for POST requests to plugin URLs with external or missing Referer values.
- Correlate WordPress audit logs with browsing patterns to identify actions triggered outside the admin UI workflow.
- Deploy WordPress security plugins that log all administrative changes with source request metadata.
Monitoring Recommendations
- Enable request logging for the wp-admin/admin-ajax.php and wp-admin/admin-post.php endpoints used by the plugin.
- Alert on plugin-related database writes originating from sessions without matching admin page views.
- Monitor for phishing campaigns targeting site administrators, since exploitation requires user interaction.
How to Mitigate CVE-2025-31572
Immediate Actions Required
- Deactivate the Multi Days Events and Multi Events in One Day Calendar plugin until a fixed release is confirmed available.
- Restrict WordPress administrator sessions to dedicated browsers or profiles to reduce cross-site request exposure.
- Audit recent calendar plugin data for unauthorized modifications.
Patch Information
No vendor-supplied patched version above 1.1.3 is referenced in the NVD entry at the time of publication. Consult the Patchstack Vulnerability Report for the latest remediation status and any subsequent vendor updates.
Workarounds
- Remove the plugin from production sites if administrators cannot verify a patched release.
- Deploy a web application firewall rule enforcing same-origin Referer checks on plugin request paths.
- Require administrators to log out of WordPress before browsing untrusted sites, limiting session availability to CSRF payloads.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
