Auth bypass in Buddypress
CVE-2021-21389
BuddyPress is an open source WordPress plugin to build a community site. In releases of BuddyPress from 5.0.0 before 7.2.1 it's possible for a non-privileged, regular user to obtain administrator rights by exploiting an issue in the REST API members endpoint. 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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.135 (96.3th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.135 · newest: 0.135 · change: 0.000
Affected products
- Buddypress — versions >= 5.0.0, < 7.2.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/buddypress/BuddyPress/security/advisories/GHSA-m6j4-8r7p-wpp3 (Third Party Advisory)
- buddypress.org/2021/03/buddypress-7-2-1-security-release/ (Release Notes, Vendor Advisory)
- codex.buddypress.org/releases/version-7-2-1/ (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-21389?
- CVE-2021-21389 is a high-severity vulnerability in Buddypress, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2021-03-26.
- How severe is CVE-2021-21389?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2021-21389 known to be exploited?
- 18 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.