Auth bypass in Proper Fraction Profilepress
CVE-2026-66047
ProfilePress (wp-user-avatar) WordPress plugin before 4.17.2 contains an unauthenticated remote code execution vulnerability that allows unauthenticated attackers to install and activate arbitrary plugins by brute-forcing a weak 32-bit connect token via the ppress_connect_process AJAX handler. Attackers can supply a caller-controlled URL through the file request parameter to trigger silent plugin installation and activation, achieving PHP code execution as the web-server user.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (59.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.009 · change: +0.004
Affected products
Weakness classification (CWE)
References
- Plugin Changelog (release-notes, patch)
- WordPress Plugin Webpage (product)
- www.vulncheck.com/advisories/profilepress-wordpress-plugin-unauthenticated-arbi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-66047?
- CVE-2026-66047 is a high-severity vulnerability in Proper Fraction Profilepress, classified under Missing Authentication for Critical Function. CVSS score: 8.1/10. Published 2026-08-31.
- How severe is CVE-2026-66047?
- High severity. CVSS v3 base score is 8.1 out of 10.