BuddyPress: Authenticated attackers can access arbitrary private message threads via user_id request parameter
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | buddypress/buddypress | < 14.5.0 | 14.5.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-53673
- https://github.com/buddypress/buddypress/commit/27d41e9749a878103b3a673b37dfc92b7f8f2cb7
- https://buddypress.org
- https://github.com/buddypress/BuddyPress
- https://wordpress.org/plugins/buddypress
- https://www.vulncheck.com/advisories/buddypress-private-message-idor-via-rest-api-user-id-parameter
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N- Weakness (CWE)
CWE-639- Platform
- Composer
- Package
buddypress/buddypress- Disclosed
- 10.06.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-j3j5-5m8v-7gvc - CC BY 4.0
Vulnerability history: buddypress/buddypress
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 5
- First → latest
- 03.2017 06.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- High 3
- Medium 2
Disclosures per year
- 2017: 1
- 2018: 0
- 2019: 0
- 2020: 1
- 2021: 1
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 2
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BuddyPress: Authenticated attackers can access arbitrary private message threads via user_id request parameter this entry
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