CVE-2025-8105: Soledad WordPress Theme RCE Vulnerability

CVE-2025-8105 Overview

CVE-2025-8105 affects the Soledad theme for WordPress, a commercial multi-concept blog and magazine theme distributed via ThemeForest. The vulnerability allows unauthenticated attackers to execute arbitrary shortcodes on affected sites. The flaw exists in all versions up to and including 8.6.7. The root cause is improper validation of a user-supplied value before passing it to the do_shortcode function.

Critical Impact
Unauthenticated remote attackers can trigger arbitrary WordPress shortcodes, enabling content manipulation, information disclosure, and abuse of any installed plugins that expose sensitive shortcode functionality.

Affected Products

Soledad WordPress theme versions through 8.6.7
WordPress sites running the Soledad theme with default configuration
Sites bundling third-party plugins that register privileged shortcodes

Discovery Timeline

2025-08-16 - CVE-2025-8105 published to the National Vulnerability Database
2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-8105

Vulnerability Analysis

The Soledad theme exposes an action handler that accepts a user-controlled parameter and passes it directly to WordPress's do_shortcode function. Because the handler does not validate or restrict the supplied value, an attacker can submit arbitrary shortcode markup. WordPress then parses and executes the shortcode within the request context.

Shortcodes in WordPress can render dynamic content, query the database, output user data, or execute logic registered by other plugins and themes. When an attacker controls the shortcode string, the impact depends on which shortcodes are registered on the target site. Common abuses include extracting private post content, enumerating users, and invoking plugin-provided shortcodes that perform privileged operations.

The issue is classified under [CWE-94] Improper Control of Generation of Code, reflecting the dynamic interpretation of attacker-controlled input.

Root Cause

The theme registers an AJAX or similar endpoint that retrieves a parameter from the HTTP request and forwards it to do_shortcode without a whitelist, sanitization step, or capability check. The endpoint is reachable without authentication, removing the standard WordPress nonce and role barriers that normally constrain shortcode execution.

Attack Vector

An unauthenticated attacker sends a crafted HTTP request to the vulnerable endpoint with a shortcode payload in the parameter. The server-side handler invokes do_shortcode on the payload and returns or processes the rendered output. No user interaction is required and the attack is performed over the network.

A detailed technical breakdown is available in the Wordfence Vulnerability Intelligence advisory.

Detection Methods for CVE-2025-8105

Indicators of Compromise

Unauthenticated POST or GET requests to Soledad theme AJAX endpoints containing [ and ] bracket characters in parameter values
Web server access logs showing repeated requests to admin-ajax.php with theme-specific action parameters from a single IP
Unexpected rendered shortcode output returned in HTTP responses to anonymous clients
New or modified WordPress posts, options, or user records following requests to Soledad endpoints

Detection Strategies

Inspect HTTP request bodies and query strings for shortcode syntax patterns such as [shortcode_name attr="value"] targeting theme AJAX handlers
Correlate anonymous requests to Soledad endpoints with subsequent database writes or plugin invocations
Alert on responses where the body contains evaluated shortcode output not present in the original request template

Monitoring Recommendations

Enable verbose logging on wp-admin/admin-ajax.php and route logs to a centralized SIEM for retention and correlation
Monitor outbound connections from the WordPress host for unexpected destinations that may indicate shortcode-triggered SSRF or data exfiltration
Track installed theme and plugin versions across the fleet to identify hosts still running Soledad 8.6.7 or earlier

How to Mitigate CVE-2025-8105

Immediate Actions Required

Update the Soledad theme to a version later than 8.6.7 via the ThemeForest changelog distribution channel
Audit installed plugins for shortcodes that expose sensitive data or privileged actions and disable any that are not required
Review WordPress access logs for prior exploitation attempts targeting Soledad AJAX endpoints
Rotate WordPress administrator credentials and API keys if exploitation indicators are present

Patch Information

The vendor has released a fixed version. Refer to the ThemeForest Soledad changelog for the patched release notes and apply the update through the WordPress dashboard or by uploading the new theme archive.

Workarounds

Deploy a Web Application Firewall rule that blocks requests containing shortcode bracket syntax to Soledad AJAX actions until the theme is updated
Restrict access to admin-ajax.php endpoints associated with the Soledad theme using server-level access controls where feasible
Remove or replace high-risk shortcodes registered by other plugins that could be abused through this vector

bash

# Example nginx rule to block shortcode payloads to vulnerable endpoints
location = /wp-admin/admin-ajax.php {
    if ($arg_action ~* "^(penci_)") {
        if ($request_body ~* "\[[a-zA-Z0-9_\-]+") {
            return 403;
        }
    }
}