CVE-2021-28998

HIGH

CMS Made Simple <= 2.2.15 - Authenticated Arbitrary File Upload via PHAR File

Title source: llm

File upload vulnerability in CMS Made Simple through 2.2.15 allows remote authenticated attackers to gain a webshell via a crafted phar file.

Core 2

Core References

Exploit

Mailing List, Third Party Advisory

CVSS v3 7.2

EPSS 0.0129

EPSS Percentile 66.6%

Attack Vector NETWORK

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

Vulnrichment

Exploitation poc

Automatable no

Technical Impact total

CWE

CWE-434

Status published

Products (1)

cmsmadesimple/cms_made_simple < 2.2.15

Published May 08, 2023

Tracked Since Feb 18, 2026