The BuddyPress Groupblog plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.9.3. This is due to the group blog settings handler accepting the `groupblog-blogid`, `default-member`, and `groupblog-silent-add` parameters from user input without proper authorization checks. The `groupblog-blogid` parameter allows any group admin (including Subscribers who create their own group) to associate their group with any blog on the Multisite network, including the main site (blog ID 1). The `default-member` parameter accepts any WordPress role, including `administrator`, without validation against a whitelist. When combined with `groupblog-silent-add`, any user who joins the attacker's group is automatically added to the targeted blog with the injected role. This makes it possible for authenticated attackers, with Subscriber-level access and above, to escalate any user (including themselves via a second account) to Administrator on the main site of the Multisite network.
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Affected Vendors & Products
References
History
Mon, 13 Apr 2026 16:15:00 +0000
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ssvc
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Mon, 13 Apr 2026 13:00:00 +0000
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Boonebgorges
Boonebgorges buddypress Groupblog Wordpress Wordpress wordpress |
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| Vendors & Products |
Boonebgorges
Boonebgorges buddypress Groupblog Wordpress Wordpress wordpress |
Sat, 11 Apr 2026 01:30:00 +0000
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| Description | The BuddyPress Groupblog plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.9.3. This is due to the group blog settings handler accepting the `groupblog-blogid`, `default-member`, and `groupblog-silent-add` parameters from user input without proper authorization checks. The `groupblog-blogid` parameter allows any group admin (including Subscribers who create their own group) to associate their group with any blog on the Multisite network, including the main site (blog ID 1). The `default-member` parameter accepts any WordPress role, including `administrator`, without validation against a whitelist. When combined with `groupblog-silent-add`, any user who joins the attacker's group is automatically added to the targeted blog with the injected role. This makes it possible for authenticated attackers, with Subscriber-level access and above, to escalate any user (including themselves via a second account) to Administrator on the main site of the Multisite network. | |
| Title | BuddyPress Groupblog <= 1.9.3 - Authenticated (Subscriber+) Privilege Escalation to Administrator via Group Blog IDOR | |
| Weaknesses | CWE-269 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Wordfence
Published:
Updated: 2026-04-13T15:15:08.152Z
Reserved: 2026-03-30T12:34:55.212Z
Link: CVE-2026-5144
Updated: 2026-04-13T15:11:33.818Z
Status : Awaiting Analysis
Published: 2026-04-11T02:16:02.633
Modified: 2026-04-13T15:01:43.663
Link: CVE-2026-5144
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