Overview
The CVE-2025-2816 is a critical security vulnerability that affects the Page View Count plugin for WordPress, versions 2.8.0 to 2.8.4. This vulnerability allows unauthorized data modification that can lead to a denial of service. The vulnerability is significant because it allows even low-level authenticated users, such as Subscribers, to update option values on a WordPress site. This could lead to a complete denial of service for legitimate users, data leakage, or potentially even system compromise.
Vulnerability Summary
CVE ID: CVE-2025-2816
Severity: High (8.1 CVSS Score)
Attack Vector: Network
Privileges Required: Low (Subscriber-level Access)
User Interaction: Required
Impact: Potential System Compromise or Data Leakage
Affected Products
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Product | Affected Versions
Page View Count Plugin for WordPress | 2.8.0 to 2.8.4
How the Exploit Works
The exploit takes advantage of a missing capability check on the yellow_message_dontshow() function in the Page View Count plugin for WordPress. This allows an attacker with Subscriber-level access to manipulate the function and update option values on the WordPress site. The attacker could use this to create an error on the site that would deny service to legitimate users or to set certain values to true, such as enabling registration.
Conceptual Example Code
A conceptual example of how this vulnerability might be exploited might look like this:
POST /wp-admin/admin-ajax.php HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
action=yellow_message_dontshow&option_name=siteurl&option_value=http://malicious.example.comIn this example, the attacker is sending a POST request to the WordPress AJAX handler with the action set to ‘yellow_message_dontshow. The option_name parameter is set to ‘siteurl’ and the option_value parameter is set to the attacker’s malicious site. If successful, this exploit would update the site’s URL to the malicious site, causing all subsequent traffic to be redirected there.
Mitigation
To mitigate this vulnerability, users are advised to apply the vendor patch as soon as it becomes available. In the meantime, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation measure. It is also recommended to regularly update your WordPress plugins to their latest versions, as they often come with security patches for known vulnerabilities.
Remember, your cybersecurity is only as strong as your weakest link, so always stay vigilant and proactive in maintaining your systems.