BuddyPress: Denial of service

BuddyPress is affected by denial of service. Exposure depends on how the affected operation is made reachable by the site. A successful request can exhaust or disrupt the affected operation and make site functionality unavailable. The published affected range is <= 14.4.0.

CVE / CNA score 7.1 CVSS 4.0 · disclosure@vulncheck.com

NVD score Pending NVD has not published its own CVSS assessment.

Component: BuddyPress
Plugin slug: buddypress
Affected: <= 14.4.0
Safe version: See mitigation notes
Published: Jun 10, 2026
Weakness: CWE-943 — Improper Neutralization of Special Elements in Data Query Logic

This CVE was published Jun 10, 2026 and is one of 18 known issues for this plugin.

What to do

Update, patch or deactivate.

No fixed release is identified. Update BuddyPress when a release after 14.4.0 becomes available; until then, disable and remove it when the site's risk warrants. The official upstream changelog lists version 14.5.2, which is newer than the published affected range. Its changelog does not clearly confirm this specific fix, so it is not counted as a known-safe release.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

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

BuddyPress 14.4.0 contains a regular expression injection vulnerability in the activity mention resolver that, when username compatibility mode is enabled, allows attackers to manipulate a REGEXP database clause by crafting mention names containing regex metacharacters. Attackers can submit @mentions whose metacharacters pass through esc_sql unescaped and are inserted into an unprepared REGEXP query against the users table, enabling boolean-based inference of usernames and denial of service through catastrophic backtracking.

CVE / CNA vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

References

Primary and upstream sources

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