CVE-2026-5144 json
BuddyPress Groupblog <= 1.9.3 - Authenticated (Subscriber+) Privilege Escalation to Administrator via Group Blog IDOR
published 2026-04-11 6 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-21658
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 36%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 6 mo ago
Exploit prediction
0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- boonebgorges BuddyPress Groupblog
Classification
- Weakness
-
- CWE-269 Improper Privilege Management
- Technology feeds
References
- github.com /boonebgorges/bp-groupblog/commit/b824593add9e2c53ef4f0d2e0824d4de0785411f
- wordfence.com /threat-intel/vulnerabilities/id/8129046a-5aa5-4644-babc-0eca9aa524d2?source=cve
- plugins.trac.wordpress.org /browser/bp-groupblog/trunk/bp-groupblog.php#L450
- plugins.trac.wordpress.org /browser/bp-groupblog/tags/1.9.3/bp-groupblog.php#L450
- plugins.trac.wordpress.org /browser/bp-groupblog/trunk/bp-groupblog.php#L190
- plugins.trac.wordpress.org /browser/bp-groupblog/tags/1.9.3/bp-groupblog.php#L190
- plugins.trac.wordpress.org /browser/bp-groupblog/trunk/bp-groupblog.php#L220
- plugins.trac.wordpress.org /browser/bp-groupblog/tags/1.9.3/bp-groupblog.php#L220
Sources
- CVE List CVE-2026-5144
- NVD CVE-2026-5144
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