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

Quick assessment

Affected
Adenion Blog2Social
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 的 Adenion Blog2Social 插件在 9.1.0 版本之前存在漏洞：低权限用户能够修改其他用户的已排期帖子记录。 具体而言，位于 中的 AJAX 处理器在执行对 表的 UPDATE 操作时，仅依据攻击者提供的 主键进行定位，而未施加 的所有权约束。这使得任何具备 权限的用户都可以重新安排、抑制或更改其他用户所创建的已排期社交媒体帖子的发布状态。

CVSS 5.4 · Medium

Possible ATT&CK Techniques 1 AI

T1204.001 · Malicious Link
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I. Basic Information for CVE-2026-89031

Vulnerability Information
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Vulnerability Title
Blog2Social WordPress Plugin < 9.1.0 Broken Access Control via b2s_calendar_move_post
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Adenion Blog2Social 0 ~ 9.1.0 -

II. Public POCs for CVE-2026-89031

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III. Intelligence Information for CVE-2026-89031

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Vendor Advisories for CVE-2026-89031 (1)

Vendor Pages for CVE-2026-89031 (1)

Same Patch Batch · Adenion · 2026-09-16 · 3 CVEs total

CVE-2026-89029 4.3 MEDIUM Blog2Social WordPress Plugin < 9.1.0 User Enumeration via AJAX Handler
CVE-2026-89030 4.3 MEDIUM Blog2Social WordPress Plugin < 9.1.0 User Email Disclosure via b2s_search_user

IV. Related Vulnerabilities

Same product: Blog2Social
Same vendor: Adenion
Same weakness: CWE-639

V. Comments for CVE-2026-89031

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