CVE-2026-19077 Duplicate Post CVE debrief

Who should care

Administrators and users of the Duplicate Post WordPress plugin should be aware of this vulnerability and take necessary actions to prevent exploitation. This includes updating the plugin to version 1.5.5 or later, reviewing user role configurations for Duplicate Post WordPress plugin access, and monitoring for unauthorized post deletions. Additionally, security teams and vulnerability management teams should prioritize patching affected systems and review compensating controls for exposed systems while remediation is scheduled and verified. Operators of WordPress sites using the Duplicate Post plugin should also be aware of the potential for data loss and take steps to protect their content. Platform administrators may need to review and adjust user permissions and access controls to mitigate the risk of exploitation. Vulnerability management teams should ensure that affected systems are identified and prioritized for patching. Security teams should monitor for signs of exploitation and be prepared to respond to incidents involving unauthorized post deletions. IT asset inventory and change management processes should be reviewed to ensure that affected systems are properly tracked and updated. Overall, a coordinated effort is required across multiple teams to effectively manage the risk associated with this vulnerability. Site owners and administrators should work closely with their security and IT teams to ensure that all necessary steps are taken to protect their sites and data. This may involve implementing additional monitoring and logging to detect potential exploitation attempts, as well as reviewing and updating incident response plans to address the potential impact of a successful exploit. By taking a proactive and coordinated approach, organizations can minimize the risk associated with this vulnerability and protect their WordPress sites and data. In addition to patching, organizations should also consider implementing compensating controls, such as restricting access to the Duplicate Post plugin, monitoring for suspicious activity, and regularly backing up WordPress site content. By prioritizing patching and implementing additional security controls

Technical summary

The Duplicate Post WordPress plugin before 1.5.5 is vulnerable to arbitrary post deletion due to lack of per-object authorisation checks in bulk copy and delete operations. Any user with granted access to the plugin can permanently delete posts, including those belonging to other users. This vulnerability affects WordPress sites using the Duplicate Post plugin, particularly those with multiple users or where user roles have been customized. The vulnerability allows for unauthorized post deletion, which can lead to data loss and potential disruption of service.

Defensive priority

Administrators should prioritize updating the Duplicate Post WordPress plugin to version 1.5.5 or later to prevent arbitrary post deletion.

Recommended defensive actions

• Update Duplicate Post WordPress plugin to version 1.5.5 or later
• Review user role configurations for Duplicate Post WordPress plugin access
• Monitor for unauthorized post deletions
• Verify plugin versions and user role configurations
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The Duplicate Post WordPress plugin before 1.5.5 does not perform per-object authorisation checks in its bulk copy and delete operations. Limited information available; verify plugin version and user role configurations. Evidence suggests that an attacker with granted access to the plugin can permanently delete posts, including those belonging to other users. Defenders should verify plugin versions, review user role configurations, and monitor for unauthorized post deletions.

Official resources