Blog2Social WordPress Plugin < 9.1.0 Broken Access Control via b2s_calendar_move_post (CVE-2026-89031) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89031

Blog2Social WordPress Plugin < 9.1.0 Broken Access Control via b2s_calendar_move_post

Answer in brief

CVE-2026-89031 records a Unknown severity vulnerability in Blog2Social WordPress Plugin < 9.1.0 Broken Access Control via b2s_calendar_move_post. The current sources do not mark it as known exploited. The current feed maps Adenion/Blog2Social (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Adenion/Blog2Social (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Adenion/Blog2Socialgeneric	>=0 <9.1.0	9.1.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for Adenion/Blog2Social.
Review the reported fix. Update Adenion/Blog2Social to 9.1.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.