CVE-2024-37490: Bard by WPRoyal CSRF Vulnerability

CVE-2024-37490 Overview

CVE-2024-37490 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] in the wproyal Bard WordPress theme. The flaw affects all versions of Bard up to and including 2.210. An attacker can craft a malicious web page that, when visited by an authenticated site user, triggers unintended state-changing requests to the WordPress site. Exploitation requires user interaction and no privileges on the target application. Successful abuse can result in limited integrity impact, though confidentiality and availability are not directly affected.

Critical Impact
Authenticated users lured to attacker-controlled pages can be forced to submit forged requests to a Bard-powered WordPress site, resulting in unauthorized state changes.

Affected Products

WordPress Bard theme by wproyal
Bard theme versions from n/a through <= 2.210
WordPress sites where the vulnerable Bard theme is active

Discovery Timeline

2025-01-02 - CVE-2024-37490 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-37490

Vulnerability Analysis

The vulnerability is a Cross-Site Request Forgery flaw classified under [CWE-352]. The Bard theme processes state-changing HTTP requests without adequately validating that the request originated from a trusted user action on the site itself. Attackers exploit this by embedding forged requests in external content and tricking authenticated users into loading it. The attack vector is network-based, requires low complexity, and needs user interaction such as clicking a link or loading a page. The scope remains unchanged, and only the integrity of theme-managed data is impacted.

Root Cause

The root cause is the absence or insufficient enforcement of anti-CSRF tokens (such as WordPress nonces verified through wp_verify_nonce() or check_admin_referer()) on sensitive request handlers exposed by the Bard theme. Without a valid, per-session, per-action token bound to the request, the theme cannot distinguish requests initiated by the legitimate user from those forged by a third-party origin.

Attack Vector

An attacker hosts a malicious page containing an auto-submitting form or crafted image tag targeting a Bard theme endpoint. When an authenticated WordPress user visits the page, the browser automatically includes their session cookies. The forged request is processed with the victim's privileges, allowing the attacker to modify theme-controlled settings or trigger administrative actions available to that user role.

No verified public exploit code is available. Refer to the Patchstack advisory for technical details.

Detection Methods for CVE-2024-37490

Indicators of Compromise

Unexpected changes to Bard theme configuration or options recorded in the WordPress options table.
POST or GET requests to theme administrative endpoints with Referer headers pointing to unrelated third-party domains.
Administrative actions performed during user sessions without corresponding manual navigation in access logs.

Detection Strategies

Inspect web server access logs for requests to Bard theme endpoints where the Referer or Origin header does not match the site's own hostname.
Correlate WordPress audit events with authenticated session activity to identify state changes lacking a preceding admin page load.
Review installed theme version via wp theme list and flag any instance of Bard at <= 2.210.

Monitoring Recommendations

Enable a WordPress audit logging plugin to track theme option updates and administrative actions.
Alert on HTTP requests to wp-admin or theme-specific handlers that lack a valid _wpnonce parameter.
Monitor for outbound clicks from phishing indicators that could deliver CSRF payloads to administrators.

How to Mitigate CVE-2024-37490

Immediate Actions Required

Update the Bard theme to a version released after 2.210 once the vendor publishes a fix.
Restrict administrative access to trusted IP ranges through web server or WAF rules.
Require administrators to log out of WordPress sessions when browsing untrusted sites.

Patch Information

The Patchstack advisory tracks Bard versions through <= 2.210 as vulnerable. Site operators should verify the current theme version, monitor the wproyal distribution channel for a patched release, and apply the update as soon as it is available.

Workarounds

Deploy a web application firewall rule that enforces same-origin Referer and Origin header checks on Bard theme endpoints.
Disable or replace the Bard theme with a maintained alternative until a patched version is released.
Enforce short session lifetimes for administrator accounts and require re-authentication for sensitive actions.

bash

# Example WAF rule concept: block requests to theme endpoints lacking same-origin headers
# ModSecurity pseudo-rule
SecRule REQUEST_URI "@contains /wp-content/themes/bard/" \
    "chain,deny,status:403,id:1002024037490,msg:'Potential CSRF against Bard theme'"
    SecRule &REQUEST_HEADERS:Origin "@eq 0" \
        "chain"
        SecRule REQUEST_HEADERS:Referer "!@beginsWith https://your-site.example"