CVE-2026-89031 Adenion CVE debrief

Who should care

WordPress site administrators and security teams should assess exposure and apply patches to prevent low-privileged users from modifying scheduled post records of other users. They should review user roles and capabilities, monitor user activity and scheduled posts for anomalies, and track exceptions and retest remediated assets.

Why it matters

The Adenion Blog2Social plugin vulnerability allows low-privileged users to modify scheduled post records of other users, potentially disrupting social media posting schedules and content. WordPress site administrators and security teams should assess exposure and apply patches to prevent exploitation.

• Low-privileged users can modify scheduled social media posts of other users
• Scheduled post records can be rescheduled, suppressed, or altered

Technical summary

The b2s_calendar_move_post AJAX handler in the Adenion Blog2Social plugin for WordPress before version 9.1.0 allows low-privileged users to modify scheduled post records of other users by issuing an UPDATE against the b2s_posts table using only the attacker-supplied b2s_id primary key with no blog_user_id ownership constraint. This allows any user with the edit_posts capability to reschedule, suppress, or alter the publication state of any other user's scheduled social media post. The vulnerability can be exploited by low-privileged users, and defenders should review user roles and capabilities to prevent exploitation.

Defensive priority

Medium priority for WordPress site administrators and security teams to assess exposure and apply patches.

Recommended defensive actions

• Assess exposure by checking if the Blog2Social plugin version is before 9.1.0
• Apply patches or updates to the Blog2Social plugin
• Monitor user activity and scheduled posts for anomalies
• Review user roles and capabilities to prevent low-privileged users from modifying scheduled posts
• Track exceptions and retest remediated assets
• 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

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on affected versions and user impact is limited. The Blog2Social plugin versions before 9.1.0 are affected, and defenders should verify the plugin version and user roles to assess exposure. The vulnerability allows low-privileged users to reschedule, suppress, or alter the publication state of any other user's scheduled social media post.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.