CVE-2020-21359

9.8 criticalEPSS 1.7%

Critical (9.8) in maccms maccms. EPSS 1.7% chance of exploitation in the next 30 days.

An arbitrary file upload vulnerability in the Template Upload function of Maccms10 allows attackers bypass the suffix whitelist verification to execute arbitrary code via adding a character to the end of the uploaded file's name.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.7% chance of exploitation in the next 30 days; higher than 77% of CVEs (scores of 2026-10-31)
CWE: CWE-434
Published: 2021-08-11
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

maccms:maccms

References

https://github.com/magicblack/maccms10/issues/80
https://github.com/magicblack/maccms10/issues/80

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