CVE-2026-89031 - Blog2Social WordPress Plugin < 9.1.0 Broken Access Control via b2s_calendar_move_post

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MEDIUM

Blog2Social WordPress Plugin < 9.1.0 Broken Access Control via b2s_calendar_move_post

Published Sep 16, 2026

5.3

MEDIUM

CVSS 4.0

EPSS 0.30%

Description

Adenion Blog2Social plugin for WordPress before 9.1.0 allows low-privileged users to modify the scheduled post records of other users. The b2s_calendar_move_post AJAX handler in includes/Ajax/Post.php issues an UPDATE against the b2s_posts table using only the attacker-supplied b2s_id primary key with no blog_user_id ownership constraint, allowing any user with the edit_posts capability to reschedule, suppress, or alter the publication state of any other user's scheduled social media post.

Affected products

Vendor Adenion Product Blog2Social Default
unaffected
- Version
  0
  Status
  affected
  Constraints
  <9.1.0

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Adenion

Blog2Social

unaffected

Version	Status	Constraints
0	affected	<9.1.0

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-639

Authorization Bypass

References (3)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-80775
Advisory
https://wordpress.org/plugins/blog2social/#developers
release-notespatch
https://www.vulncheck.com/advisories/blog2social-wordpress-plugin-broken-access-control-via-b2s-calendar-move-post
third-party-advisory

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-80775		Advisory
https://wordpress.org/plugins/blog2social/#developers		release-notespatch
https://www.vulncheck.com/advisories/blog2social-wordpress-plugin-broken-access-control-via-b2s-calendar-move-post		third-party-advisory