CVE-2024-25933 Overview
CVE-2024-25933 is a sensitive information disclosure vulnerability in the PeproDev Ultimate Invoice plugin for WordPress. The flaw affects all versions from initial release through 1.9.7. Unauthenticated attackers can retrieve sensitive data over the network without user interaction. The issue is classified under [CWE-200] (Exposure of Sensitive Information to an Unauthorized Actor).
The vulnerability impacts WordPress sites running the affected plugin, where invoice data and related records may be accessible to unauthorized actors. Confidentiality is the primary security property at risk.
Critical Impact
Remote unauthenticated attackers can access sensitive invoice and customer data stored by the PeproDev Ultimate Invoice plugin on affected WordPress installations.
Affected Products
- PeproDev Ultimate Invoice plugin for WordPress, all versions up to and including 1.9.7
- WordPress sites with the peprodev_ultimate_invoice plugin enabled
- Deployments on cpe:2.3:a:peprodev:peprodev_ultimate_invoice running unpatched releases
Discovery Timeline
- 2024-03-17 - CVE-2024-25933 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-25933
Vulnerability Analysis
The PeproDev Ultimate Invoice plugin fails to enforce adequate access controls around endpoints that expose sensitive data. Unauthenticated remote actors can interact with the plugin and retrieve information that should be restricted to authorized users. The weakness is cataloged under [CWE-200], covering exposure of information to actors not explicitly authorized to view it.
Because the attack vector is network-based and requires neither privileges nor user interaction, the barrier to exploitation is minimal. The impact is limited to confidentiality, with no direct integrity or availability consequences indicated by the scoring vector. Sites that store customer details, billing data, or other invoice metadata through the plugin are most exposed.
Root Cause
The root cause is missing or insufficient authorization checks on plugin-handled requests. The plugin processes requests that return sensitive invoice records without verifying the requester's identity or capability. This permits any anonymous web client to obtain data the plugin manages.
Attack Vector
An attacker sends crafted HTTP requests to the WordPress site running the vulnerable plugin. No authentication, session, or social engineering is required. The response discloses sensitive data managed by peprodev_ultimate_invoice. Refer to the Patchstack Vulnerability Advisory for advisory-level technical details.
Detection Methods for CVE-2024-25933
Indicators of Compromise
- Unauthenticated HTTP requests to PeproDev Ultimate Invoice plugin endpoints under /wp-content/plugins/pepro-ultimate-invoice/ or related AJAX actions.
- Unusual volumes of requests from a single source enumerating invoice identifiers or numeric IDs.
- Web server logs showing successful 200 responses to plugin endpoints from clients lacking a valid WordPress session cookie.
Detection Strategies
- Inventory WordPress sites and identify any installation of peprodev_ultimate_invoice at version 1.9.7 or earlier.
- Monitor web access logs for requests to plugin paths returning non-empty response bodies to unauthenticated clients.
- Deploy a Web Application Firewall (WAF) rule that flags or blocks anonymous access to plugin endpoints handling invoice data.
Monitoring Recommendations
- Forward WordPress and reverse proxy logs to a centralized analytics platform and alert on anomalous request patterns targeting plugin URLs.
- Track outbound data sizes from plugin endpoints; spikes may indicate scraping of invoice records.
- Review plugin audit trails and database access logs for bulk reads of invoice tables.
How to Mitigate CVE-2024-25933
Immediate Actions Required
- Update PeproDev Ultimate Invoice to a release later than 1.9.7 as soon as a fixed version is available from the vendor.
- If no fixed version is available, disable the plugin until a patch is applied.
- Restrict access to plugin endpoints at the web server or WAF layer to authenticated administrators only.
- Rotate any credentials, API keys, or customer-facing tokens that may have been exposed in invoice records.
Patch Information
Consult the Patchstack Vulnerability Advisory for the latest remediation guidance and fixed version information. Apply the vendor-supplied update through the WordPress plugin manager and verify the version reported in the admin dashboard after upgrade.
Workarounds
- Block unauthenticated requests to /wp-content/plugins/pepro-ultimate-invoice/ paths via WAF or reverse proxy rules.
- Require HTTP authentication or IP allowlisting on the WordPress admin and plugin AJAX endpoints until the plugin is patched.
- Remove or archive historical invoice records that are no longer required, reducing the data available for disclosure.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
