CVE-2025-59563 Overview
CVE-2025-59563 is a privilege escalation vulnerability affecting the Sonaar WordPress theme in versions up to and including 4.27.4. The flaw allows authenticated users holding the low-privileged Subscriber role to elevate their privileges within the WordPress site. The weakness is categorized under [CWE-266: Incorrect Privilege Assignment]. An attacker exploiting this issue can gain administrative-level control over the affected WordPress installation, compromising site integrity, content, and user data.
Critical Impact
Authenticated Subscriber-level accounts can escalate to administrative privileges, leading to full compromise of confidentiality, integrity, and availability of the WordPress site running the Sonaar theme.
Affected Products
- Sonaar WordPress theme versions <= 4.27.4
- WordPress installations using the Sonaar theme
- Sites accepting Subscriber-level registrations on vulnerable Sonaar versions
Discovery Timeline
- 2026-06-17 - CVE-2025-59563 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-59563
Vulnerability Analysis
The vulnerability resides in the Sonaar WordPress theme and stems from improper privilege assignment ([CWE-266]). A user authenticated with the Subscriber role can perform actions reserved for higher-privileged roles. The attack vector is network-based and requires only low-level privileges with no user interaction. Exploitation results in full impact across confidentiality, integrity, and availability. Sonaar is a music-oriented WordPress theme commonly deployed on radio, podcast, and artist sites, expanding the population of exposed installations.
Root Cause
The root cause is incorrect privilege assignment within the theme's handling of authenticated user actions. The theme exposes functionality that fails to verify whether the requesting user holds an appropriate capability before executing privileged operations. Subscribers, who normally have only read and profile-edit capabilities, can invoke handlers that modify roles, user metadata, or theme-controlled administrative settings. The absence of proper capability checks (current_user_can()) or nonce validation in the affected code paths permits the escalation.
Attack Vector
An attacker first obtains or registers a Subscriber account on a target site running Sonaar <= 4.27.4. Many WordPress sites permit open Subscriber registration, lowering the barrier to entry. After authenticating, the attacker submits a crafted HTTP request to a vulnerable theme endpoint that lacks adequate authorization controls. The request modifies the attacker's role or related user metadata, granting administrative privileges. With administrative access, the attacker can install malicious plugins, inject backdoors, exfiltrate data, or pivot to the underlying host. Refer to the Patchstack Sonaar Theme Vulnerability advisory for additional technical context.
Detection Methods for CVE-2025-59563
Indicators of Compromise
- Subscriber accounts whose wp_capabilities user meta has been changed to administrator or editor outside of normal admin workflows.
- Unexpected new administrator accounts created shortly after a Subscriber registration or login event.
- Installation of unfamiliar plugins, themes, or PHP files in wp-content/ following Subscriber authentication.
- Outbound requests or scheduled tasks (wp_cron) added by accounts that were previously Subscribers.
Detection Strategies
- Audit the wp_usermeta table for role changes and correlate timestamps with web access logs for Subscriber sessions.
- Inspect web server logs for POST requests to Sonaar theme endpoints originating from low-privilege users.
- Compare installed theme files against the official Sonaar distribution to identify tampering.
- Monitor WordPress audit logs for set_role, add_user_meta, and update_user_meta events tied to non-administrative actors.
Monitoring Recommendations
- Enable a WordPress security or audit logging plugin to capture role changes, user creation, and plugin installation events.
- Forward WordPress and web server logs to a centralized logging or SIEM platform for correlation and alerting.
- Alert on any privilege transitions where the source account was created within a short time window prior to escalation.
- Continuously inventory installed themes and versions to identify hosts running Sonaar <= 4.27.4.
How to Mitigate CVE-2025-59563
Immediate Actions Required
- Update the Sonaar theme to a version later than 4.27.4 as soon as the vendor-supplied patched release is available.
- Disable open user registration or restrict the default registration role to a non-privileged custom role pending patching.
- Review all existing user accounts and remove unauthorized administrator or editor accounts.
- Rotate credentials for all administrative users and invalidate active WordPress sessions.
Patch Information
A fixed release addressing CVE-2025-59563 is referenced in the Patchstack Sonaar Theme Vulnerability advisory. Site operators should upgrade beyond Sonaar 4.27.4 to the vendor's remediated version. Verify the upgrade through the WordPress admin Themes screen and validate that the theme version reported matches the patched release.
Workarounds
- Place the affected site behind a web application firewall (WAF) with virtual patching rules for the Sonaar privilege escalation vector.
- Temporarily switch to a different theme until the Sonaar upgrade can be applied if patching is not immediately feasible.
- Set define('DISALLOW_FILE_MODS', true); in wp-config.php to prevent plugin and theme installation through the admin UI if an account is compromised.
- Enforce multi-factor authentication for all WordPress accounts to reduce the impact of credential-based Subscriber access.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
