Overview
A Cross-Site Request Forgery (CSRF) vulnerability has been identified in the Time Sheets plugin for WordPress, tracked as CVE-2025-10055. This vulnerability affects all versions of the plugin up to and including 2.1.3. Successful exploitation of this flaw allows unauthenticated attackers to perform actions on behalf of a site administrator, provided they can trick the administrator into clicking a malicious link or performing an unintended action.
Technical Details
The Time Sheets plugin, in versions 2.1.3 and earlier, lacks proper nonce validation on several endpoints. Nonces are security tokens designed to prevent CSRF attacks. The absence of or improper implementation of these tokens means that an attacker can craft a malicious HTTP request. If a logged-in administrator clicks a crafted link containing this request, the browser will automatically send it to the WordPress site. Because the administrator is authenticated, the server will execute the request as if it originated from the administrator, potentially leading to unauthorized actions such as:
- Modifying plugin settings
- Creating or deleting time sheets
- Altering user roles (depending on the vulnerable endpoint)
- Potentially gaining administrative access if the correct endpoint is exploited
CVSS Analysis
The Common Vulnerability Scoring System (CVSS) score for CVE-2025-10055 is 4.3 (Medium). The CVSS vector is likely AV:N/AC:M/Au:N/C:N/I:P/A:N. This score reflects the following characteristics:
- Attack Vector (AV:N): The attack can be launched remotely over the network.
- Attack Complexity (AC:M): The attack requires user interaction, specifically the administrator needs to be tricked into clicking a link.
- Authentication (Au:N): No authentication is required to initiate the attack; the attacker exploits the authenticated session of the administrator.
- Confidentiality Impact (C:N): There is no impact to confidentiality; the attacker cannot directly access sensitive information.
- Integrity Impact (I:P): There is a partial impact to integrity; the attacker can modify data or settings.
- Availability Impact (A:N): There is no impact to availability; the attack does not cause a denial-of-service.
Possible Impact
The impact of a successful CSRF attack on the Time Sheets plugin can range from minor inconvenience to significant security breaches, depending on the specific actions the attacker is able to trigger. Potential impacts include:
- Data Manipulation: Attackers could manipulate time sheet data, potentially leading to inaccurate payroll or project tracking.
- Privilege Escalation: While not guaranteed, a crafted CSRF request might allow an attacker to escalate their privileges, gaining unauthorized access to sensitive areas of the WordPress site.
- Website Defacement: In some scenarios, attackers could modify website content if the vulnerable endpoints control content display.
- Account Takeover: Though less direct, successful exploitation can lead to lateral movement within the system.
Mitigation or Patch Steps
The most effective mitigation is to update the Time Sheets plugin to the latest version. It is highly recommended to update to a version greater than 2.1.3, as the vendor has addressed the CSRF vulnerability in subsequent releases. You can update the plugin through the WordPress admin dashboard:
- Log in to your WordPress admin dashboard.
- Navigate to “Plugins” -> “Installed Plugins”.
- Locate the “Time Sheets” plugin.
- If an update is available, click the “Update Now” link.
If an update is unavailable, consider temporarily disabling the plugin until an updated version is released. Regularly check the WordPress plugin repository for updates.
