CVE-2021-3164

HIGHNVD 8.88.8—Elevated

8.8

ChurchRota 2.6.4 is vulnerable to authenticated remote code execution. The user does not need to have file upload permission in order to upload and execute an arbitrary file via a POST request to resources.php.

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 95.7%
KEV: Not listed

Published

January 26, 2021

Last Modified

November 21, 2024

References (4)

cve@mitrehttps://github.com/Little-Ben/ChurchRota
cve@mitrehttps://github.com/rmccarth/cve-2021-3164
af854a3a-2127-422b-91ae-364da2661108https://github.com/Little-Ben/ChurchRota
af854a3a-2127-422b-91ae-364da2661108https://github.com/rmccarth/cve-2021-3164

Weakness Classification(1)

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

CWE-434Unrestricted Upload of File with Dangerous Type

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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2026-05-29 13:42 UTCepss_batch
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2026-05-26 21:37 UTCEG score recompute
2026-05-26 21:37 UTCGHSA enrichment
2026-05-26 07:17 UTCepss_batch
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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCrmccarth/cve-2021-3164
First seen Jan 20, 2021
Church Rota version 2.6.4 is vulnerable to authenticated remote code execution. The user does not need to have file upload permission in order to upload and execute an arbitrary file. The application is written primarily with PHP so we use PHP in our PoC
Open source ↗

Frequently asked(5)

What is CVE-2021-3164?

CVE-2021-3164 is a high vulnerability published on January 26, 2021. ChurchRota 2.6.4 is vulnerable to authenticated remote code execution. The user does not need to have file upload permission in order to upload and execute an arbitrary file via a POST request to resources.php.

When was CVE-2021-3164 disclosed?

CVE-2021-3164 was first published in the National Vulnerability Database on January 26, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-3164 actively exploited?

CVE-2021-3164 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-3164?

CVE-2021-3164 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2021-3164?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-3164, 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-2021-3164

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-3164?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)