What is CVE-2021-3172?

CVE-2021-3172 is a high-severity vulnerability in Php-Fusion, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 8.1/10. Published 2023-02-17.

How severe is CVE-2021-3172?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Php-Fusion

CVE-2021-3172

An issue in Php-Fusion v9.03.90 fixed in v9.10.00 allows authenticated attackers to cause a Distributed Denial of Service via the Polling feature.

Published 2023-02-17 · last modified 2026-06-17.

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:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (49.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Php-Fusion

Weakness classification (CWE)

CWE-732 — Incorrect Permission Assignment for Critical Resource

References

github.com/PHPFusion/PHPFusion/issues/2351 (Exploit, Third Party Advisory, Issue Tracking)
github.com/PHPFusion/PHPFusion/commit/7b8df6925cc7cfd8585d4f34d9120ff3a2e5753e (Patch)

Frequently asked questions

What is CVE-2021-3172?: CVE-2021-3172 is a high-severity vulnerability in Php-Fusion, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 8.1/10. Published 2023-02-17.
How severe is CVE-2021-3172?: High severity. CVSS v3 base score is 8.1 out of 10.