What is CVE-2020-15277?

CVE-2020-15277 is a high-severity vulnerability in Basercms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2020-10-30.

How severe is CVE-2020-15277?

High severity. CVSS v3 base score is 7.2 out of 10.

Arbitrary file upload in Basercms

CVE-2020-15277

baserCMS before version 4.4.1 is affected by Remote Code Execution (RCE). Code may be executed by logging in as a system administrator and uploading an executable script file such as a PHP file. The Edit template component is vulnerable. The issue is fixed in version 4.4.1.

Vulnerability class: Unrestricted File Upload

Published 2020-10-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.023 (82.7th percentile), scored 2026-09-28.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Basercms
Baserproject Basercms — versions >= 4.0.0, < 4.4.1

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

github.com/baserproject/basercms/security/advisories/GHSA-6fmv-q269-55cw (Patch, Third Party Advisory)
basercms.net/security/20201029 (Vendor Advisory)
github.com/baserproject/basercms/commit/bb027c3967b0430adcff2d2fedbc23d39077563b (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-15277?: CVE-2020-15277 is a high-severity vulnerability in Basercms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2020-10-30.
How severe is CVE-2020-15277?: High severity. CVSS v3 base score is 7.2 out of 10.