WordPress security changelog
HIGH CVE-2026-5144 Deferred

BuddyPress Groupblog: Privilege escalation or authentication bypass

BuddyPress Groupblog is affected by privilege escalation or authentication bypass. Exploitation requires at least subscriber-level access. A successful request can grant permissions or access that the caller should not possess. The published affected range is <= 1.9.3.

CVE / CNA score 8.8 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
BuddyPress Groupblog
Plugin slug
bp-groupblog
Affected
<= 1.9.3
Safe version
> 1.9.3
Published
Apr 11, 2026
Weakness
CWE-269 — Improper Privilege Management

This CVE was published Apr 11, 2026 and is one of 1 known issue for this plugin.

What to do

Update, patch or deactivate.

Update BuddyPress Groupblog to a release after 1.9.3, or disable and remove it until a fixed version is available.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical 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.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Primary and upstream sources