Broken Access Control in Adenion Blog2Social Plugin for WordPress
CVE-2026-89031

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Blog2social
Vendor
CVE Published:
16 September 2026

What is CVE-2026-89031?

The Adenion Blog2Social plugin for WordPress allows low-privileged users to interfere with other users' scheduled social media posts. Specifically, the b2s_calendar_move_post AJAX handler can be exploited, as it performs an update operation on the b2s_posts table without enforcing ownership constraints based on blog_user_id. This vulnerability permits any authenticated user having the edit_posts capability to manipulate the scheduling and publication state of posts created by others, resulting in unauthorized changes to content and potential misinformation.

Affected Version(s)

Blog2Social 0 < 9.1.0

References

https://wordpress.org/plugins/blog2social/#developers
release-notespatch
https://www.vulncheck.com/advisories/blog2social-wordpres...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Choriyev Qahramon (ciprobe)
VulnCheck
.