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BuddyPress privilege escalation via REST API

High severity GitHub Reviewed Published Mar 19, 2021 in buddypress/buddypress • Updated Feb 1, 2023

Package

composer buddypress/buddypress (Composer)

Affected versions

>= 5.0.0, < 7.2.1

Patched versions

7.2.1

Description

Impact

It's possible for a non-privileged, regular user to obtain administrator rights by exploiting an issue in the BuddyPress REST API members endpoint.

Patches

The vulnerability has been fixed in BuddyPress 7.2.1. Existing installations of the plugin should be updated to this version to mitigate the issue.

References

https://buddypress.org/2021/03/buddypress-7-2-1-security-release/

For more information

If you have any questions or comments about this advisory:

References

@ehti ehti published to buddypress/buddypress Mar 19, 2021
Published by the National Vulnerability Database Mar 26, 2021
Reviewed Oct 6, 2021
Published to the GitHub Advisory Database Oct 6, 2021
Last updated Feb 1, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS score

78.383%
(98th percentile)

Weaknesses

CVE ID

CVE-2021-21389

GHSA ID

GHSA-m6j4-8r7p-wpp3

Source code

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