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Description

The Blog2Social: Social Media Auto Post & Scheduler plugin for WordPress is vulnerable to authorization bypass through user-controlled key in all versions up to, and including, 8.8.3. This is due to the plugin's AJAX handlers failing to validate that the user-supplied 'b2s_id' parameter belongs to the current user before performing UPDATE and DELETE operations. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify, reschedule, or delete other users' scheduled social media posts.

PUBLISHED Reserved 2026-03-17 | Published 2026-04-08 | Updated 2026-04-08 | Assigner Wordfence




MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Problem types

CWE-639 Authorization Bypass Through User-Controlled Key

Product status

Default status
unaffected

Any version
affected

Timeline

2026-03-17:Vendor Notified
2026-04-07:Disclosed

Credits

Mariusz Maik finder

References

www.wordfence.com/...-fef9-4d6e-8328-51efb997c99c?source=cve

plugins.trac.wordpress.org/...l/trunk/includes/Ajax/Post.php

plugins.trac.wordpress.org/...s/8.8.2/includes/Ajax/Post.php

plugins.trac.wordpress.org/...l/trunk/includes/Ajax/Post.php

plugins.trac.wordpress.org/...s/8.8.2/includes/Ajax/Post.php

plugins.trac.wordpress.org/...l/trunk/includes/Ajax/Post.php

plugins.trac.wordpress.org/...s/8.8.2/includes/Ajax/Post.php

plugins.trac.wordpress.org/...nk/includes/B2S/Post/Tools.php

plugins.trac.wordpress.org/....2/includes/B2S/Post/Tools.php

plugins.trac.wordpress.org/...unk/includes/B2S/Ship/Save.php

plugins.trac.wordpress.org/...8.2/includes/B2S/Ship/Save.php

plugins.trac.wordpress.org/...l/trunk/includes/Ajax/Post.php

plugins.trac.wordpress.org/...s/8.8.2/includes/Ajax/Post.php

plugins.trac.wordpress.org/...cial/trunk/includes/Loader.php

plugins.trac.wordpress.org/...tags/8.8.2/includes/Loader.php

plugins.trac.wordpress.org/changeset/3494550/

cve.org (CVE-2026-4330)

nvd.nist.gov (CVE-2026-4330)

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