CVE-2025-8678 Overview
The WP Crontrol plugin for WordPress contains a blind Server-Side Request Forgery (SSRF) vulnerability [CWE-918] affecting versions 1.17.0 through 1.19.1. The flaw resides in the plugin's use of the wp_remote_request function, which does not restrict outbound request destinations. Authenticated attackers with Administrator-level access or higher can force the WordPress server to issue arbitrary HTTP requests. Attackers can use this behavior to reach internal services, query cloud metadata endpoints, or interact with private network resources otherwise unreachable from the internet.
Critical Impact
Authenticated administrators can pivot through the WordPress host to query and modify internal services behind the network perimeter.
Affected Products
- WP Crontrol plugin for WordPress version 1.17.0
- WP Crontrol plugin for WordPress versions 1.17.1 through 1.19.0
- WP Crontrol plugin for WordPress version 1.19.1
Discovery Timeline
- 2025-08-22 - CVE-2025-8678 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-8678
Vulnerability Analysis
WP Crontrol lets administrators manage WordPress cron events, including HTTP-based events. The vulnerable code path passes user-controlled URLs to wp_remote_request without validating the destination host or scheme. Because the request originates from the web server itself, it bypasses network segmentation that would normally block external clients from reaching internal endpoints. The response body is not returned to the attacker, making this a blind SSRF. Attackers can still infer results through timing, error signals, or by triggering state-changing requests against internal APIs.
Root Cause
The vulnerability stems from missing URL validation before calling wp_remote_request in the plugin's bootstrap logic. The plugin trusts administrator input and does not enforce an allowlist of destinations, block private IP ranges, or reject loopback and link-local addresses. Review of the plugin source is available in the WordPress Plugin Code Review.
Attack Vector
An attacker must first obtain Administrator credentials on the target WordPress site. With that access, the attacker creates or edits a cron event that triggers an HTTP request to a chosen URL. Suitable targets include cloud instance metadata services, internal management interfaces, container orchestration APIs, and databases exposed on the internal network. Because the CVSS vector reports high privileges required and high attack complexity, exploitation is bounded by administrator compromise or a hostile insider, but consequences on multi-tenant or cloud-hosted sites are substantial.
No verified proof-of-concept code is published. The mechanism is described in the Wordfence Vulnerability Analysis.
Detection Methods for CVE-2025-8678
Indicators of Compromise
- Outbound HTTP requests from the WordPress PHP worker process to RFC1918 addresses, 127.0.0.1, 169.254.169.254, or other cloud metadata endpoints.
- New or modified WP Crontrol cron events referencing internal hostnames, IP literals, or non-standard ports.
- Unexpected entries in the WordPress cron option or _transient_doing_cron referencing arbitrary URLs.
- Web server access logs showing administrator activity on wp-admin/tools.php?page=crontrol_admin_manage_page immediately before anomalous outbound connections.
Detection Strategies
- Correlate WordPress administrator authentication events with subsequent egress traffic from the web tier to internal networks.
- Alert on any PHP-originated requests targeting cloud metadata IPs such as 169.254.169.254 or fd00:ec2::254.
- Baseline expected outbound destinations for the WordPress host and flag deviations.
- Review installed plugin versions across managed WordPress sites to identify hosts running WP Crontrol 1.17.0 through 1.19.1.
Monitoring Recommendations
- Forward WordPress audit logs, web server access logs, and network flow data to a centralized analytics platform for correlation.
- Enable file integrity monitoring on the wp-content/plugins/wp-crontrol/ directory.
- Monitor administrator role assignments and session creation to detect the precondition for exploitation.
How to Mitigate CVE-2025-8678
Immediate Actions Required
- Upgrade WP Crontrol to version 1.19.2 or later on every WordPress site.
- Audit all Administrator accounts, remove unused accounts, and rotate credentials on any site that ran a vulnerable version.
- Restrict egress traffic from WordPress web servers to only the destinations required for normal operation.
- Block outbound access from the web tier to cloud instance metadata endpoints or require IMDSv2 with hop-limit enforcement on AWS.
Patch Information
The maintainers addressed the flaw in WordPress Plugin Changeset #3347075, which validates request destinations before invoking wp_remote_request. Site administrators should apply the update through the WordPress plugin manager or WP-CLI.
Workarounds
- If patching is delayed, disable the WP Crontrol plugin until the upgrade can be applied.
- Enforce two-factor authentication on all Administrator accounts to raise the bar for exploitation.
- Place the WordPress host behind an egress proxy that rejects requests to private IP ranges and metadata addresses.
- Apply web application firewall rules that block administrator requests attempting to schedule cron events with private or loopback URLs.
# Configuration example: upgrade WP Crontrol using WP-CLI
wp plugin update wp-crontrol --version=1.19.2
wp plugin list --name=wp-crontrol --fields=name,status,version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
