CVE-2021-3172

HIGHNVD 8.18.1—Elevated

8.1

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.

CVSS v3: 8.1
EG Score: 8.1(medium)
EPSS: 44.8%
KEV: Not listed

Published

February 17, 2023

Last Modified

March 19, 2025

References (4)

cve@mitrehttps://github.com/PHPFusion/PHPFusion/commit/7b8df6925cc7cfd8585d4f34d9120ff3a2e5753e
cve@mitrehttps://github.com/PHPFusion/PHPFusion/issues/2351
af854a3a-2127-422b-91ae-364da2661108https://github.com/PHPFusion/PHPFusion/commit/7b8df6925cc7cfd8585d4f34d9120ff3a2e5753e
af854a3a-2127-422b-91ae-364da2661108https://github.com/PHPFusion/PHPFusion/issues/2351

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-732Incorrect Permission Assignment for Critical Resource

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
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Frequently asked(5)

What is CVE-2021-3172?

CVE-2021-3172 is a high vulnerability published on February 17, 2023. 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.

When was CVE-2021-3172 disclosed?

CVE-2021-3172 was first published in the National Vulnerability Database on February 17, 2023, with the most recent update on March 19, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-3172 actively exploited?

CVE-2021-3172 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 44.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-3172?

CVE-2021-3172 has a CVSS v3 base score of 8.1 (NVD).

How do I remediate CVE-2021-3172?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-3172, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-3172

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-3172?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)