What is CVE-2021-36547?

CVE-2021-36547 is a critical-severity vulnerability in Mara Cms Project, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-10-28.

How severe is CVE-2021-36547?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-36547 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Mara Cms Project

CVE-2021-36547

A remote code execution (RCE) vulnerability in the component /codebase/dir.php?type=filenew of Mara v7.5 allows attackers to execute arbitrary commands via a crafted PHP file.

Vulnerability class: Unrestricted File Upload

Published 2021-10-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.033 (88.1th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000

Affected products

Mara Cms Project — versions 7.5

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

github.com/r0ck3t1973/RCE/issues/1 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-36547?: CVE-2021-36547 is a critical-severity vulnerability in Mara Cms Project, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-10-28.
How severe is CVE-2021-36547?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-36547 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.