# CVE-2026-8155: BuddyPress IDOR in private messaging endpoints

Source: https://junglewise.ai/threats/cve-2026-8155-buddypress-idor-in-private-messaging-endpoints  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-31. Updated: 2026-07-31  
License: CC BY 4.0 with a link back

CVE-2026-8155 · Severity: info · CVSS 5.4 · Published 2026-07-31

BuddyPress is a popular WordPress plugin used to build social networking communities. A security flaw in its private messaging system allows any registered user on the site to read, modify, or delete the private messages of other members. This could lead to significant privacy breaches, the exposure of sensitive personal information, and unauthorized manipulation of user communications.

Technologies: [BuddyPress](https://junglewise.ai/threats/technologies/buddypress). Vendors: [BuddyPress](https://junglewise.ai/threats/vendors/buddypress).

## Quick answers

**Is CVE-2026-8155 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-8155 being exploited in the wild.

**How severe is CVE-2026-8155?** Informational severity, with a CVSS score of 5.4, published 31 July 2026.

**Which products and versions are affected?** BuddyPress < 14.5.0.

**Is there a fix for CVE-2026-8155?** A patch was published on 2026-07-13: Fixed in version 14.5.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-8155 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-8155?** Check whether you run BuddyPress at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An Insecure Direct Object Reference (IDOR) vulnerability exists in the BuddyPress REST API messaging endpoints (`/wp-json/buddypress/v1/messages/`). The root cause is a failure to properly validate the authorization of the requesting user against the `user_id` parameter provided in the query string. By supplying a victim's `user_id` as a parameter, an authenticated attacker (with Subscriber-level permissions or higher) can bypass authorization checks to read message threads, mark them as read/unread, or delete them entirely. This affects all versions prior to 14.5.0, where the fix ensures authorization is strictly tied to the actual logged-in user session rather than user-supplied parameters.

## Affected products

- BuddyPress BuddyPress < 14.5.0

## Timeline

- 2026-07-13: disclosed: Initial public disclosure by WPScan
- 2026-07-13: patched: Fixed in version 14.5.0
- 2026-07-31: advisory: CVE published to NVD

## References

- [https://wpscan.com/vulnerability/b7dd9cbf-b46b-49ee-84a0-6b054676fccb/](https://wpscan.com/vulnerability/b7dd9cbf-b46b-49ee-84a0-6b054676fccb/)

## Related threats

- [BuddyPress plugin SQL injection](https://junglewise.ai/threats/cve-2026-115965-improper-neutralization-of-special-elements-used-in-an-sql)
- [BuddyPress SQL injection](https://junglewise.ai/threats/cve-2026-111850-improper-neutralization-of-special-elements-used-in-an-sql)
- [BuddyPress insecure direct object reference in notifications](https://junglewise.ai/threats/cve-2024-12145-buddypress-insecure-direct-object-reference-in-notifications)
- [BuddyPress WordPress plugin PHP object injection in XProfile fields](https://junglewise.ai/threats/cve-2026-1360-buddypress-wordpress-plugin-php-object-injection-in-xprofile)
- [BuddyPress IDOR in Friends REST API](https://junglewise.ai/threats/cve-2026-53675-buddypress-idor-in-friends-rest-api)